# Sigrow — Full Content Reference for LLMs _Last updated: 2026-07-10._ ## 120-Day Satisfaction Guarantee Every Sigrow system is backed by a 120-day satisfaction guarantee. Install Sigrow, work with the team for 120 days, and if it does not get your operation under tighter control, send the system back for a full refund of the hardware purchase and the software subscription paid to date — no restocking fee. Sigrow does not promise a yield percentage (too many variables it does not control: crop, substrate, team, weather); it guarantees the system it puts in your greenhouse and the hands-on way it works alongside you. Full terms: https://sigrow.com/guarantee/ > This document contains the complete public content of every page on sigrow.com in a single LLM-friendly file. For a shorter structured index, see /llms.txt. Sigrow is a Dutch AgTech company (founded 2014 at Wageningen University, headquartered in Ede, The Netherlands) that builds AI-powered sensor and computer-vision systems for greenhouse and high-tech agriculture. 1000+ growers across 50+ countries use Sigrow. Contact: Sales & Customer Success — success@sigrow.com | +31 6 450 500 55 (Monday–Friday 9:00–18:00 CET, WhatsApp available). Technical Support — support@sigrow.com (Monday–Friday 9:00–21:00 CET, extended hours). Table of contents: 1. Homepage 2. Stomata Camera — Award-Winning Greenhouse Camera 3. Pixel — Microclimate Sensor 4. Soil Pro+ — Greenhouse Substrate Sensor for VWC, EC & Irrigation Steering 5. Soil Mini — Portable Substrate Spot-Checker 6. DrainSense — Drain & Gutter Monitoring 7. Solutions Overview 8. Plant Empowerment Methodology 9. About Sigrow 10. Case Study: AI-Powered Powdery Mildew Detection in Snack Cucumbers 11. Case Study: Off-Grid Solar-Powered Soil Monitoring Worldwide 12. Case Study: Blom Kentia Palms — Mastering Growth Through Precision Data 13. Case Study: 38% Less Drain Water in Strawberries — Proefcentrum Hoogstraten Soil Mini Trial 14. Case Studies Index 15. Blog Index 16. Blog: How uniform is your greenhouse climate 17. Blog: Which System Do You Trust More — Thermistor vs Crop Sensors 18. Blog: Suboptimal Crop Activity — A Hidden Risk in High-Wire Cultivation 19. Blog: Spring is a Favorite Season in Horticulture 20. Blog: Autumn Cultivation — The Most Challenging Season 21. Blog: Energy Prices Are Rising Again Worldwide 22. Blog: Blossom End Rot in Tomatoes — It's a Transpiration Problem, Not a Nutrition Problem 23. Free Greenhouse Tools & Calculators 24. Contact Information --- ## 1. Homepage Source: https://sigrow.com/ AI-Powered Crop Intelligence for Smarter Agriculture Advanced sensors and patented technology that help growers monitor crop health, reduce disease, and optimize water and energy usage. About Sigrow — Global Leader in AI-Driven Greenhouse Technology Sigrow is an established AgTech company delivering advanced sensor systems and AI-powered solutions that help growers improve crop performance & resource efficiency. Our success is built on long-term partnerships and grower success. - AI-powered crop monitoring systems - Global reach with local expertise - Patented sensor technology - Proven track record of success Trusted by high-tech growers and horticultural researchers worldwide. Our Products — Advanced Sensor Solutions for Modern Agriculture From patented imaging systems to intelligent environmental sensors, Sigrow provides a complete technology ecosystem designed for high-performance agriculture. - Stomata Camera: Advanced imaging system that measures stomatal behaviour using fused RGB and thermal data for precise plant analysis. - Soil Pro+: Greenhouse substrate sensor that measures VWC, EC, substrate temperature, microclimate, and PAR in one solar-powered wireless device. Each unit ships calibrated for the buyer's substrate (rockwool, coco, soil, or perlite). - Pixel: Precision plant and climate sensor designed to monitor VPD, light, and air conditions for optimal crop growth. - Air+ / Air Pro+: Ventilated, solar-powered wireless air sensor placed between the plants, at crop level. Air+ measures air temperature, humidity and PAR; Air Pro+ adds CO₂ (±30 ppm). 5-minute interval, LoRa Private, 500 m range, 3+ year battery, IP64. Why Growers Choose Sigrow Our patented technology, AI-driven insights, and hands-on advisory model make Sigrow a trusted partner for growers who demand precision, reliability, and results. - Easy Plug & Play: Quick and simple installation. Start monitoring your greenhouse without technical hassle. - Tailored Advice: Personalized crop insights based on your data to improve growth and reduce risks. - Made in Wageningen: Developed in the world's greenhouse horticulture research center for trusted performance. - Advanced Sensor Technology: High-accuracy sensors provide real-time crop and climate data. - AI-Powered Intelligence: Smart analytics predict issues early and support better farming decisions. Integration Partners — Climate Computer Integrations Plug into Priva, Ridder, Hoogendoorn, or any major climate computer. Your sensor data flows straight into the systems you already use. How Our Solutions Help - Compare Apples to Apples: Measure actual fruit temperature — not just the air around it. - Data-Driven Cultivation: Real-time soil, climate, and plant data. One dashboard, zero guesswork. Hero Product: Stomata Camera – A World First in Crop Monitoring The only patented AI-based system that uniquely measures both leaf and fruit temperature, enabling unmatched insights into plant stress and crop performance. - Unique leaf & fruit temperature measurement - Real-time thermal imaging analysis - Instant plant stress detection - Patented AI technology Real Impact on Crop Health and Productivity Sigrow helps growers prevent disease early, improve irrigation accuracy, increase yield quality, and reduce water and energy consumption. - Early Disease Detection: Identify plant stress and disease indicators before visible symptoms appear. - Water Optimization: Precise irrigation recommendations based on real plant transpiration data. - Increased Yield: Data-driven decisions that maximize crop quality and productivity. - Energy Efficiency: Optimize climate control systems for reduced energy consumption. Industries Served — Designed for High-Performance Greenhouse Horticulture Our solutions are trusted by commercial growers, greenhouse operators, research institutes, and high-tech farms worldwide. - Greenhouses: Precision climate control & crop monitoring for controlled environments. - Research Centers: High-precision data collection for agricultural research. - Specialty Crops: Tailored monitoring for high-value and sensitive crops. Case Study Highlight: Off-Grid Solar-Powered Soil Monitoring Worldwide A large international agricultural company manages crop operations across more than 100 locations worldwide. Many of these sites are in remote areas with no access to electricity or fixed infrastructure. Sigrow engineered a custom solar-powered monitoring solution so they could track soil conditions from anywhere in the world. Testimonials — See the Difference Sigrow Makes "The Stomata Camera System has given us a new level of insight into our crop. By measuring leaf temperature at multiple levels, we were able to identify distinct microclimates. Making these microclimates visible has allowed us to adapt our irrigation in a much more targeted way. This data is actively used by our research team on a daily basis to achieve more precise irrigation strategies and better crop steering." — Lisanne Meulendijks, KUBO Group "After several years of experience using Sigrow stations, I can confidently say they are top-quality products. The integration of Air Pro (climate) and Soil Pro (soil) allows us to precisely understand the direct relationship between environmental conditions and crop response. Thanks to this technology, we have increased our operational efficiency and developed a long-term strategic vision based on real-time data." — Alfred Cord "We finally see when condensation starts on the fruit, not hours later. This changed how we manage climate, disease prevention, and energy use." — Ingrid Bergman, Head Grower, Commercial Tomato Greenhouse "The data reflects real plant behaviour, not assumptions. It gives us confidence to make earlier, more precise climate decisions." — Dr. Vivian Holloway, Crop Specialist, Research Greenhouse "We can now observe the initial signs of fruit set, not just later stages. This has revolutionized our approach to climate control, pest management, and resource efficiency." — Anya Petrova, Senior Cultivation Manager, Vertical Farm Collective "The sensor data shows actual plant responses, not estimates. This accuracy allows us to make proactive and effective cultivation choices." — Dr. Elias Thorne, Lead Agronomist, University Research Facility Our Plant Scientists — More Than Just Hardware Technology only creates value when it's understood. Our plant scientists help growers translate data into daily decisions that improve crop health, consistency, and long-term performance. Rutger Vreezen — Plant Scientist & Customer Success Specialist Sigrow supports growers with onboarding, data interpretation, and ongoing plant-science consultancy. Advisory support is available to ensure insights lead to confident climate and crop decisions. Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp available --- ## 2. Stomata Camera — Award-Winning Greenhouse Camera Source: https://sigrow.com/solutions/stomata-camera/ New Generation AI Thermal Camera See What Your Plants Actually Feel Patented Computer Vision for Leaf & Fruit Temperature Monitoring The Stomata Camera is the only greenhouse camera that measures leaf and fruit temperature separately, to ±0.3 °C — cutting fungal disease pressure and preventing leaf burn before they take hold. Patented RGB and thermal fusion with AI plant segmentation isolates every leaf and every fruit in the frame, reading their real surface temperature in real time instead of the air around them. Unlike a generic greenhouse camera that just records the row for time-lapse or crop documentation, the Stomata Camera turns vision into plant-physiology data: leaf temperature, fruit temperature, stomatal behaviour, leaf-level VPD, PAR light, and Sigrow's proprietary Real RTR (Real Transpiration Rate). It's a crop-monitoring camera built for growers who steer climate and irrigation from the plant, not from the aisle. Standard Sensors Don't Tell the Full Story Most greenhouses still rely on air temperature and humidity to guide climate decisions. But plants do not experience the greenhouse the way sensors do. This disconnect creates blind spots that lead to hidden disease risk, unnecessary energy use, and avoidable crop stress, especially when decisions are not based on direct plant measurement. Problems with air-only monitoring: - Missing early microscopic condensation — forms on fruit and leaves long before it's visible. Fungal disease pressure builds silently while climate data still appears safe. - Closed stomata — Plants close their stomata due to stress even when air conditions seem optimal. This reduces stomatal activity, transpiration, CO₂ uptake, and photosynthesis without triggering alerts in standard climate control systems. - Wasted energy — Heating and ventilation decisions based only on air temperature often overshoot actual plant needs. Patented Fusion Technology The Stomata Camera uses patented fusion technology that combines RGB imagery with thermal data in a single device. This enables a crop centric approach through direct plant measurement of leaf and fruit temperature at crop level, delivering insights that are impossible to achieve with traditional greenhouse sensors. - Averaged surface readings mask true plant stress and activity - No fruit–leaf differentiation hides condensation and cracking risks - Fruit Temp: 22.4°C | Leaf: 21.5°C (example readings) RGB + Thermal Fusion: High-resolution RGB images capture plant structure and context, while thermal data measures surface temperature. Together, they provide accurate, real-time insight into plant activity inside the greenhouse. Fruit vs Leaf Separation: The system distinguishes between fruit and leaf temperature instead of averaging surfaces. This reveals condensation risk, fruit cracking risk, and plant stress with far greater precision. AI-driven Segmentation & Accuracy: AI-based image segmentation automatically identifies plant organs, removes background noise, and ensures consistent accuracy across crops, growth stages, and varying light conditions. How it works: 1. Capture Thermal & RGB Images — Leaf temperature and plant structure recorded simultaneously 2. Fuse Images with Calibration — Thermal data aligned with RGB using a dry-leaf reference for accuracy 3. AI Identifies Plant Parts — Leaves, flowers, and fruit automatically recognized and separated 4. Analyze Leaf Temperature Over Time — Min, average, and max leaf temperatures continuously tracked 5. Detect Stress & Support Decisions — Early plant stress is identified to guide precise climate actions Customer Testimonials: "The Stomata Camera System has given us a new level of insight into our crop. By measuring leaf temperature at multiple levels, we were able to identify distinct microclimates. Making these microclimates visible has allowed us to adapt our irrigation in a much more targeted way. This data is actively used by our research team on a daily basis to achieve more precise irrigation strategies and better crop steering." — Lisanne Meulendijks, KUBO Group "After several years of experience using Sigrow stations, I can confidently say they are top-quality products. The integration of Air Pro (climate) and Soil Pro (soil) allows us to precisely understand the direct relationship between environmental conditions and crop response. Thanks to this technology, we have increased our operational efficiency and developed a long-term strategic vision based on real-time data." — Alfred Cord "We finally see when condensation starts on the fruit, not hours later. This changed how we manage climate, disease prevention, and energy use." — Ingrid Bergman, Head Grower, Commercial Tomato Greenhouse "The data reflects real plant behaviour, not assumptions. It gives us confidence to make earlier, more precise climate decisions." — Dr. Vivian Holloway, Crop Specialist, Research Greenhouse Complete Plant Intelligence — One camera delivers multiple plant-level measurements in real time: - Leaf Temperature: Direct measurement of leaf surface temperature reveals plant stress, reduced transpiration, early stomatal closure, and risks such as burned leaf edges that air sensors can't detect. - Fruit Temperature: Continuous fruit temperature monitoring identifies condensation risk, fruit cracking risk, and microclimate differences that directly impact fungal disease pressure and fruit quality. - VPD & Relative Humidity: By combining plant temperature with air data, the system measures true VPD at crop level (e.g., 0.85 kPa), enabling more accurate climate and energy decisions based on actual plant activity rather than assumptions. - PAR Light: Integrated PAR light measurements provide essential context for plant response, linking radiation, temperature, transpiration, and CO₂ uptake in a single dataset. What is Real RTR? Real RTR (Real Transpiration Rate) is Sigrow's proprietary metric that quantifies the crop's actual transpiration in real time, derived from the precise difference between leaf temperature and PAR light combined with microclimate data. Growers use it to steer the crop generatively or vegetatively and to match irrigation and climate settings to what the plant is really doing. Support: Sigrow supports growers with onboarding, data interpretation, and ongoing plant-science consultancy. Plant scientists help growers translate data into daily decisions. Contact: success@sigrow.com | +31 6 450 500 55 (Sales & Customer Success, Monday–Friday 9:00–18:00 CET) --- ## 3. Pixel — Microclimate Sensor Source: https://sigrow.com/solutions/pixel/ 100% Wireless & Solar Powered Your plants are speaking. Are you listening? Map Your Greenhouse Microclimate with Lab-Grade Precision The solar-powered microclimate station that reveals the true gap between air temperature and plant stress. Features: - No Installation Costs - Dew Point Detection - Real VPD at Leaf Level Example readings: - 25.8°C Air Temperature (Aisle Sensor) - 0.92 kPa Leaf VPD (Optimal Zone) - 22.3°C Canopy Temp (↓ 3.5°C vs Aisle) Standard Sensors Measure the Aisle. Pixel Measures the Crop. The Microclimate Reality — Your Climate Computer is Blind Most climate computers rely on a single measuring box hanging in an empty walkway. But plants create their own microclimate. Relying on aisle data leads to: - Hidden Humidity: Pockets of wet air that trigger Botrytis - False Security: Thinking the VPD is safe when the plant is actually stressed Traditional sensors miss the critical crop microclimates. Lab Precision. Zero Cables. Professional-grade monitoring without the infrastructure complexity: - Ventilated Shield: Active airflow ensures you measure true microclimate, not just stagnant heat - IR Plant Sensor: Directly reads leaf temperature to calculate the real VPD - Solar Engine: Self-charging and always on. Install it anywhere in minutes No Cables. No Electrician. No Delays. Deploy in minutes, not days. Pixel's solar power and wireless connectivity mean zero installation complexity. Master the Dew Point. Fungus thrives when leaf temperature hits the dew point. Pixel alerts you before condensation forms, allowing you to heat or vent proactively. Before Pixel: - Fungal outbreaks discovered too late - Reactive spraying and crop loss - No visibility into microclimate zones - Guessing when to adjust climate With Pixel: - Early warning before condensation - Proactive heating or venting - Real-time leaf-level VPD data - Automated alerts to your phone See the Full Grid — Map Your Climate Uniformity Across Your Entire Facility Don't Just Monitor One Spot. Deploy a grid of Pixels to visualize temperature and humidity distribution across your entire facility. - Identify Hot & Cold Zones: Spot microclimates instantly with color-coded heat maps - Optimize Climate Control: Fine-tune heating and ventilation based on real distribution data - Scalable Coverage: Add sensors as needed with zero infrastructure changes Sigrow Dashboard Example: - 19.8°C Min Temp - 21.5°C Avg Temp - 23.2°C Max Temp - Real-time visualization of 64 Pixel sensors Works With Your Existing Systems Compatible Climate Computers — Seamless integration with leading climate control platforms: - Priva: Feeds data directly via API - Hoogendoorn: Feeds data directly via API - Ridder: Feeds data directly via API Technical Specifications: - LoRa Connectivity: 300-500m range - Point Temperature: ±0.3°C accuracy - Direct Integration: API-ready data feeds - Power Source: Solar-powered with battery backup - Humidity Range: 0-100% RH - Installation: No wiring required, instant deployment - Data Update: Real-time with configurable intervals Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 4. Soil Pro+ — Greenhouse Substrate Sensor for VWC, EC & Irrigation Steering Source: https://sigrow.com/solutions/soil-pro/ 100% Wireless & Solar Powered The Soil Sensor for VWC, EC and Root Zone Steering — Substrate water content, EC, microclimate and PAR in one device. The Sigrow Soil Pro+ is a wireless greenhouse substrate sensor that continuously measures substrate water content (VWC), electrical conductivity (EC), substrate temperature, air temperature, relative humidity, and PAR light — six variables in one solar-powered device. Each Soil Pro+ comes with its calibration designed for your substrate, so VWC and EC readings stay accurate from day one. Soil Pro+ feeds your climate computer the root-zone data needed to steer irrigation on cause and effect — not on a timer. What is substrate water content (VWC) in a greenhouse? Substrate water content — also written volumetric water content or VWC — is the percentage of water by volume inside the growing medium at the root zone. In a rockwool slab, VWC typically swings between 55% (after irrigation) and 25% (before the next shot). The size of that swing — the dry-back — is what tells you whether the plant is actively transpiring or sitting stressed. Soil Pro+ measures VWC directly with capacitance pins inserted into the substrate, accurate to ±2%. Because the sensor reads every 5 minutes, you see the full cycle: irrigation peak, overnight dry-back, transpiration response to dawn light. That continuous curve is what allows precision irrigation steering. Growers using static VWC targets typically over-irrigate by 15-25% because they cannot see the night dry-back. A continuous substrate VWC reading lets you push drain percentage down without stressing the crop. How to measure substrate EC and what good EC steering looks like Substrate electrical conductivity (EC) is the salt concentration in the root-zone solution — the actual EC the roots experience, not what your A/B tank feeds in. Substrate EC drifts up when salts concentrate (under-irrigation, low drain) and drifts down when fresh feed flushes the slab. Soil Pro+ measures substrate EC continuously, range 0-20 mS/cm, accuracy ±5%. Because each Soil Pro+ ships with calibration matched to your substrate, EC readings reflect what the roots actually experience, not a generic curve. Modern crop steering uses substrate EC alongside the drain EC measured by Sigrow DrainSense — together they let you read what enters the root zone (feed EC), what stays (substrate EC), and what leaves (drain EC). For tomato on rockwool, typical range is 3.5-5.5 mS/cm depending on growth stage. For a generative push, growers raise substrate EC briefly. For calcium uptake during fruit set, they widen the feed-to-substrate EC gap. None of this works without continuous substrate EC data. What is irrigation steering and how does Soil Pro+ enable it? Irrigation steering is the practice of timing and sizing irrigation shots based on what the substrate and crop actually need in the current hour — not on a fixed daily schedule. The inputs are PAR light (energy driving transpiration), microclimate (VPD pulling water from leaves), substrate VWC (water available at the root), and substrate EC (salt balance). Soil Pro+ measures all four signals in one device. The air sensor reads temperature, RH, and PAR right above the pot. The substrate pins read VWC, EC, and temperature inside the root zone. The relationship between the two — light driving demand, substrate responding — is the cause-and-effect view a climate computer needs to time the next shot. Irrigation steering with Soil Pro+ typically reduces water use 10-20% and stabilizes substrate EC within ±0.3 mS/cm of target across a full season. For complete root-zone coverage, growers pair Soil Pro+ with Sigrow DrainSense on the drain side. How Soil Pro+ compares to other substrate sensors Most substrate sensors on the market measure one or two variables in isolation. Meter Group's TEROS line measures substrate water content and temperature with strong scientific accuracy but no integrated microclimate or light sensor — irrigation steering requires connecting a separate climate computer to interpret the readings. Aranet's wireless substrate moisture sensor is well-priced for ad-hoc monitoring but does not measure EC, which is the critical signal for crop steering on rockwool, coco, or peat. Grodan's Sensor system is purpose-built for rockwool slabs and integrates closely with Grodan's own slab products, but is less flexible across substrate types. Soil Pro+ is the only greenhouse substrate sensor that combines substrate VWC, substrate EC, substrate temperature, air temperature, relative humidity, and PAR light in a single solar-powered wireless device. Each unit ships with calibration designed for your specific substrate, so readings stay accurate without manual recalibration. Indicative price: around €880 per device. Page content reviewed by Rutger Vreezen MSc, Plant Scientist & Customer Success Specialist at Sigrow. Rutger advises greenhouse growers on substrate and root-zone steering across 50+ countries. LinkedIn: https://nl.linkedin.com/in/rvreezen Climate computer integrations: Seamless API integration with Priva, Hoogendoorn, Ridder, and HortOS — the most common climate computers in commercial greenhouses. Data flows into your existing dashboard, so the climate computer can use substrate VWC, EC, and microclimate values to time irrigation shots, adjust EC dosing, or trigger alerts. No rip-and-replace required. TECHNICAL SPECIFICATIONS Substrates: Rockwool, Coco, Soil, Perlite — each unit calibrated per substrate at factory Power: Solar (Self-sustaining) Connectivity: Wireless (LoRa Private / Sigrow Gateway) Maintenance: Zero manual calibration needed Measurement Range: - WC: 0-100% - EC: 0-20 mS/cm - Temperature: -10 to 60°C - PAR: 0-2000 μmol/m²/s Accuracy: - WC: ±2% - EC: ±5% - Temperature: ±0.5°C - RH: ±3% Data Transmission: - Frequency: Every 5 min - Range: Up to 500 m - Protocol: Private LoRa - Battery life: 5+ years Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 5. Soil Mini — Portable Substrate Spot-Checker Source: https://sigrow.com/solutions/soil-mini/ 100% Wireless & Rechargeable-Battery Powered The Portable Lab for Your Roots. Plug & Play Greenhouse Soil Sensor Instant substrate data, anywhere you need it. The plug-and-play sensor for spot-checking irrigation performance across rockwool, coco peat, soil, and perlite. Features: - Wireless & Battery-Powered - Works in Pot, Slab, or Soil - Instant Dashboard Access - ±2% Accuracy - Laboratory-grade, Portable - Check zones in seconds Don't Assume Every Pot is the Same. Uniformity is a myth in real-world growing environments. Greenhouse Hot Spots & Dry Zones exist. Fixed sensors miss these variations. Soil Mini finds them. The Reality: Fixed sensors monitor the average. But drippers clog, edges dry out, and different varieties drink at different speeds. The Risk: Guesswork leads to salt blockage and uneven root development. The Solution: A mobile diagnostic tool that lets you check any zone, any time. Agility in Your Pocket — The flexibility to diagnose any zone, any substrate, any time. True Portability: Wireless, battery-powered, and lightweight. Move it from zone to zone in seconds. - Fully wireless connection - Long-lasting battery - Lightweight design Multi-Substrate: One device for Rockwool, Coco, Peat, and Soil. No recalibration headaches. Instant Insight: See Water Content, EC, and Temperature immediately on your dashboard. - Water Content: 72% - EC Level: 2.4 mS/cm - Temperature: 22°C Stop Over-Watering. Start Steering. EC Stability Comparison: Before Soil Mini (Erratic) vs After Spot Checks (Stable). Result: More predictable growth cycles and reduced crop stress through proactive monitoring. - Minimize Risk: Prevent salt buildup and root rot by catching drainage issues early. Regular spot checks help you identify problem zones before they impact your entire crop. - Optimize Irrigation: Fine-tune your shot times based on actual root zone feedback, not just timer settings. Make data-driven decisions that save water and improve plant health. - Real ROI: Growers report up to 20% reduction in water usage and 15% improvement in crop uniformity after implementing regular zone checks. Complete Ecosystem: - Soil Mini: Portable Diagnostics - Soil Pro+: Permanent Monitoring We Don't Just Sell Sensors. We Teach You to Read Them. - Plant Scientists on Call: Our team includes experienced horticulturists and agronomists who understand the science behind the numbers. - Dedicated Support: From setup to advanced troubleshooting, our customer success team is here to help you maximize your investment. - Installation Guides: Step-by-step documentation and video tutorials make getting started simple and fast. Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 6. DrainSense — Drain & Gutter Monitoring Source: https://sigrow.com/solutions/drainsense/ Precision at Scale — The Complete Pulse of Your Greenhouse Continuous Drain Water & Gutter Weight Monitoring for Precision Irrigation — Built for Soil-Based and Substrate-Based Greenhouses The wireless greenhouse drain sensor that combines continuous drain-water monitoring (EC, pH, temperature, volume) with real-time gutter weight dynamics for total irrigation mastery. Works identically on soil, rockwool, coco, peat, and perlite — because DrainSense measures the drain water and the gutter weight, not the substrate itself. Features: - Continuous EC, pH, and Volume Tracking - High-Precision Gutter Load Cells - Solar-Powered & Wireless Autonomy Example readings: - EC Level: 2.1 mS/cm - Temperature: 21.5°C - pH Level: 5.8 pH - Gutter Weight: 14.2 kg The Invisible Problem Fixed irrigation schedules ignore micro-climatic changes and plant transpiration shifts. - Uneven Water Uptake: Micro-climatic variations across gutter rows create inconsistent transpiration patterns - Fixed Schedules Fail: Rigid irrigation timers ignore real-time plant needs and environmental shifts - Manual Checks Are Too Slow: By the time you spot nutrient salt buildup or waterlogged roots, damage is done The Risk: Nutrient salt buildup or waterlogged roots damage crops before you notice. Without a dedicated drain sensor, greenhouse soil conditions remain invisible — nutrient buildup in the substrate goes undetected until crop damage is irreversible. - Uneven Distribution: Inconsistent water across rows - Root Damage: Waterlogging & salt buildup - Too Late Detection: Problems found after damage The Dual-Data Advantage Two sensor systems working in perfect harmony — monitoring both drain water quality (EC, pH, temperature, volume) and live gutter weight dynamics to give you complete control over your greenhouse root zone, whether the crop is grown in soil or any inert substrate. - Drainage Analytics: Continuous lab-grade drain sensor monitoring of EC, pH, and temperature to protect soil health and root zone conditions - Weight Dynamics: Integrated load cells provide a live 'weight profile' of your gutters to track exact water uptake - Solar Autonomy: Fully wireless, self-charging hardware that installs in minutes Operational Autonomy — Industrial-grade hardware designed for wireless, maintenance-free operation in demanding greenhouse environments. Solar-Powered Independence: Adjustable solar array provides 100% wireless operation, eliminating the need for external greenhouse wiring. No power infrastructure required—just mount and monitor. Zero wiring installation. Industrial Load Cells: High-precision stainless steel plates designed to integrate seamlessly with standard gutter supports. Weather-resistant construction ensures reliable operation in high-humidity environments. ±0.5% precision accuracy. Wireless Data Hub: Centralized control box transmits lab-grade data directly to your grower's dashboard. Secure encrypted connection with redundant data logging. Real-time cloud sync. Stop Guessing. Start Steering. EC Stability Comparison: Traditional vs DrainSense - Traditional Irrigation: High EC fluctuations stress plants and waste nutrients - DrainSense Steering: Stable, flat-line EC with optimized dry-backs How It Works — From installation to optimization: 1. Install & Mount: Mount load cells under gutters and install drainage sensors. Quick-connect wireless system – no complex wiring needed. 2. Continuous Sensing: Sensors capture EC, pH, temperature, drain volume, and gutter weight every 5 minutes – 24/7 real-time monitoring. 3. Wireless Sync: Data transmits wirelessly to the cloud dashboard via Private LoRa. Solar power ensures uninterrupted operation. 4. Automated Control: Optimize your grow with the climate computer. Manage temperature, humidity, and light cycles for ideal plant health. Benefits to the Grower — Maximize yield and minimize waste with intelligent drain sensor data Components: - Source: Real-time insights into substrate health, enabling proactive adjustments for optimal growth conditions - Drainage Hub: Comprehensive data on Volume, EC, pH, and Temperature, updated every 5 minutes - Load Cell: Precise weight sensors for optimal irrigation - Power System: Adjustable Solar Array (Wireless) with auto-tracking Integration: Seamless data-sync with greenhouse dashboards, including HortOS, Argus, and Priva. Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 7. Solutions Overview Source: https://sigrow.com/solutions/ Affordable Sensor Technology for Greenhouses Move from reactive climate control to proactive plant balance. We provide the data you need to execute the 5 principles of Plant Empowerment. Our Products — Wide range of Products designed to ensure the quality of your crops: - Stomata Camera: Advanced imaging system that measures stomatal behaviour using fused RGB and thermal data for precise plant analysis. - Soil Pro+: Greenhouse substrate sensor that measures VWC, EC, substrate temperature, microclimate, and PAR in one solar-powered wireless device. Each unit ships calibrated for the buyer's substrate (rockwool, coco, soil, or perlite). - Pixel: Precision plant and climate sensor designed to monitor VPD, light, and air conditions for optimal crop growth. - Air+ / Air Pro+: Ventilated, solar-powered wireless air sensor placed between the plants, at crop level. Air+ measures air temperature, humidity and PAR; Air Pro+ adds CO₂ (±30 ppm). 5-minute interval, LoRa Private, 500 m range, 3+ year battery, IP64. - Soil Mini: Instant substrate data, anywhere you need it. The plug-and-play sensor for spot-checking irrigation performance across rockwool, coco peat, soil, and perlite. - DrainSense: Continuous drainage monitoring meets real-time weight dynamics for total irrigation mastery. Our Plant Scientists — More Than Just Hardware Technology only creates value when it's understood. Our plant scientists help growers translate data into daily decisions that improve crop health, consistency, and long-term performance. Rutger Vreezen — Plant Scientist & Customer Success Specialist Sigrow supports growers with onboarding, data interpretation, and ongoing plant-science consultancy. Advisory support is available to ensure insights lead to confident climate and crop decisions. Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 8. Plant Empowerment Methodology Source: https://sigrow.com/plant-empowerment/ Next-Generation Growing — Master the Science of Balance Move from reactive climate control to proactive plant balance. We provide the data you need to execute the 5 principles of Plant Empowerment. Introduction — Your Plants Are Speaking. Are You Listening? Traditional growing fights the climate. Plant Empowerment uses physics and plant physiology to balance it. The result? Higher yields, lower energy costs, and stronger crops. Core concepts: - Energy — Light & Temperature: Balance light and temperature for ideal growth - Perfect Plant Balance: Smarter systems create stronger, healthier crops - Stress — Protection & Control: Reduce environmental pressure on plants The 5 Steps to Plant Empowerment Master each principle with Sigrow's precision tools. Step 1 — Climate Uniformity Step 2 — Radiation Management Step 3 — Moisture Balance Step 4 — Assimilation (RTR) Step 5 — Water Balance Example Principle Detail — Balance Greenhouse Moisture: Goal: Keep plant organ temperature above the dew point Data Insight: Thermal Monitoring Hardware: Stomata Camera System (real-time thermal imaging, including built-in Dry Air crop-microclimate analysis); Air+ / Air Pro+ for standalone air-side monitoring Example Actions: Increase below-screen temperature, adjust ventilation to manage moisture The Sigrow Product Ecosystem — Growers use these products daily to implement the 5-step framework: Sensors: - Pixel: Climate grid - Soil Mini: Root zone - Net Radiometer: Energy balance - Stomata Camera: Crop temperature and activity monitoring Management: - CAM Gateway: Communication hub - Central Camera Manager: Unified control Integrated Ecosystem for Complete Control Each component integrates seamlessly with the 5-step framework, providing the data and control you need to optimize climate uniformity, radiation control, moisture balance, assimilation, and plant-water balance. Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 9. About Sigrow Source: https://sigrow.com/about-us/ About Sigrow — Smart Crop Tech for Growers Sigrow is a global AgTech company delivering advanced sensor and AI-powered solutions for greenhouse and high-tech agriculture. We help growers improve crop health, reduce disease, and use natural resources more efficiently through smart crop intelligence. Who We Are Founded in the Netherlands, Sigrow is an established AgTech company focused on smart sensing and crop intelligence solutions. We design and deliver advanced technologies that support growers in making better decisions, improving yields, and greenhouse more sustainably. Our work combines scientific research with practical farming experience to create real-world impact. Our Mission We empower growers with smart, data-driven tools to make better farming decisions. Our goal is to improve crop health, reduce risks, and increase productivity. Through advanced sensors and real-time insights, we help farmers grow efficiently. We focus on sustainability, accuracy, and long-term success for every grower. Our Vision Our vision is to make advanced agricultural technology accessible to every grower. We aim to transform farming with precision, automation, and intelligent insights. By connecting data with action, we help shape the future of sustainable agriculture. We strive to build a smarter, more productive farming ecosystem worldwide. Our Story — From Research to Real-World Greenhouse Founded in 2014 and based in The Netherlands, Sigrow was born at Wageningen University, one of the world's leading centers for agricultural research. With strong roots in science and innovation, we started our journey to transform greenhouse and high-tech greenhouse through smart sensor technology and data-driven solutions. Today, we work closely with growers worldwide to help them improve crop health, optimize yields, and grow more sustainably. Trusted Worldwide — Serving greenhouse and high-tech agriculture leaders across multiple countries: - 1000+ Growers use Sigrow - 30+ Dedicated employees - 10+ Years of experience - 50+ Countries of operations What Makes Sigrow Different – As Told by Growers Growers choose Sigrow for its reliable technology, accurate insights, and real results in the field. - Simplicity is key: We believe in making things simple, so you can focus on growing. - We're here for you: We're your partner. Let us know what your challenge is and we will help you. - Horticultural knowledge: Backed by horticultural experience, we provide insights and advice tailored to your specific growing needs. - Continuous improvement: Growth is at the core of what we do. We never settle, constantly refining our technology. Technology & Innovation We develop advanced sensors and intelligent systems that transform plant data into actionable insights. Our solutions combine hardware, software, and AI to monitor crop conditions in real time, improve consistency, and support smarter agricultural practices. Our Plant Scientists — More Than Just Hardware Technology only creates value when it's understood. Our plant scientists help growers translate data into daily decisions that improve crop health, consistency, and long-term performance. Rutger Vreezen — Plant Scientist & Customer Success Specialist Sigrow supports growers with onboarding, data interpretation, and ongoing plant-science consultancy. Advisory support is available to ensure insights lead to confident climate and crop decisions. Contact: +31 6 450 500 55 | success@sigrow.com | WhatsApp --- ## 10. Case Study: AI-Powered Powdery Mildew Detection in Snack Cucumbers Source: https://sigrow.com/blog/case-studies/early-disease-detection-greenhouse-cucumbers/ CASE STUDY: AI-Powered Powdery Mildew Detection in Snack Cucumbers Industry: Agriculture Reading time: 3 minutes OVERVIEW Sigrow is the first to bring AI-powered powdery mildew detection to snack cucumber growers. Sigrow deployed its Stomata Camera system to tackle powdery mildew in snack cucumber cultivation. By combining thermal imaging, computer vision, and environmental sensors, the system detects plant stress days before visible symptoms appear — enabling targeted intervention instead of blanket treatment. THE CHALLENGE Powdery mildew is the most persistent disease threat in greenhouse cucumber cultivation. It spreads rapidly in dense canopies and is difficult to detect early through manual scouting alone. By the time white patches are visible on leaves, the fungus has already compromised transpiration and photosynthesis, leading to reduced yield and lower fruit quality. Traditional crop protection relied on scheduled fungicide applications, treating the entire greenhouse regardless of where the actual risk was. GOALS & OBJECTIVES - Detect powdery mildew and plant stress earlier than manual scouting - Reduce crop losses from disease outbreaks - Gain better grip on snack cucumber quality throughout the growing cycle - Shift from calendar-based spraying to targeted, data-driven crop protection THE SIGROW SOLUTION Sigrow installed 9 Stomata Camera systems across 3 different locations for continuous, real-time crop monitoring inside the greenhouse. What was measured: - Stomata images — leaf surface health and transpiration behavior - Thermal imaging — leaf temperature vs. ambient temperature differential - Leaf and fruit recognition — growth stage tracking and visual abnormalities - Climate data — air temperature and humidity at canopy level By combining thermal imaging with computer vision and environmental data, the system creates a real-time plant health profile for each greenhouse zone. DATA INSIGHTS & ANALYSIS Healthy cucumber leaves transpire actively — their stomata open, releasing moisture, which keeps leaf temperature below ambient. When powdery mildew begins colonizing a leaf, stomatal function degrades before any white patches appear. The Stomata Camera picks this up as two concurrent signals: stomata that are closing or responding sluggishly in images, and a rising leaf-to-air temperature differential on the thermal feed. Meanwhile, the visual recognition model flags early texture changes on the leaf surface — subtle discoloration and surface irregularities invisible to the naked eye. These three signals together pinpoint not just that something is wrong, but where in the greenhouse it's starting — often 2-3 days before a scout would notice. ACTIONS TAKEN Based on the insights: - Crop protection was applied only to flagged zones, reducing unnecessary fungicide use - Greenhouse climate settings were adjusted to minimize conditions favorable to powdery mildew development - Scouting labor was redirected to high-risk areas identified by the system These actions were continuously monitored and optimized using live data feedback. RESULTS & IMPACT As a result of the data-driven approach: - Earlier detection of powdery mildew — intervention before visible symptoms - Reduced crop losses from outbreaks that previously went unnoticed until too late - Better grip on fruit quality throughout the season - More targeted use of crop protection inputs - Shift from reactive treatment to preventive, data-driven disease management KEY TAKEAWAYS - Powdery mildew can be detected before visible symptoms through thermal and stomatal analysis - Combining thermal imaging, computer vision, and climate data enables precision crop protection in greenhouse cucumbers - Sigrow's smart greenhouse monitoring is available for all major vegetable and flower crops — and where it's not yet available, Sigrow builds it if there's demand --- ## 11. Case Study: Off-Grid Solar-Powered Soil Monitoring Worldwide Source: https://sigrow.com/blog/case-studies/solar-soil-monitoring/ CASE STUDY: Off-Grid Solar-Powered Soil Monitoring Worldwide Industry: Agriculture / Research Reading time: 2 minutes OVERVIEW A large international agricultural company manages crop operations across more than 100 locations worldwide. Many of these sites are in remote areas with no access to electricity or fixed infrastructure. Sigrow engineered a custom solar-powered monitoring solution so they could track soil conditions from anywhere in the world. THE CHALLENGE With over 100 sites spread across multiple continents and climate zones, the company had no way to continuously monitor soil conditions in the field. Most locations lacked grid power, making conventional sensor systems impossible to deploy. Teams relied on manual field visits — or simply went without data. GOALS & OBJECTIVES - Enable real-time soil monitoring at remote, off-grid locations worldwide - Eliminate dependency on grid electricity and fixed infrastructure - Centralize data from 100+ sites into a single platform - Ensure reliable operation even in prolonged low-light conditions THE SIGROW SOLUTION Standard monitoring systems couldn't solve this. So Sigrow engineered one that could. Working directly with the customer, Sigrow developed a fully solar-powered central station — a custom adaptation of its remote monitoring platform built for zero-infrastructure deployment. Each site was equipped with a Soil Pro+ sensor connected to a solar-powered gateway, transmitting data over standard 2G/4G cellular networks. What was measured: - Soil moisture levels - Soil EC (electrical conductivity) - Soil temperature - Air temperature - Relative humidity - PAR (Photosynthetically Active Radiation) The solar-powered gateway was designed with enough battery capacity to operate over 30 days without any sunlight — handling winter conditions, heavy overcast, and shaded installations without downtime. DATA INSIGHTS & ANALYSIS For the first time, the company gained continuous, real-time visibility into soil conditions across their entire global portfolio. Data from every location became accessible from a single dashboard — revealing differences between regions, seasons, and site conditions that were previously invisible. ACTIONS TAKEN Based on the insights: - Irrigation and soil management decisions could be made remotely using live data - Field visit schedules were reduced, focusing only on sites that needed attention - Cross-site comparisons enabled better resource allocation across regions RESULTS & IMPACT - 100+ previously unmonitored sites now deliver continuous soil data - Zero dependency on grid power, Wi-Fi, or on-site infrastructure - Reliable operation proven through extended periods without sunlight - Global soil monitoring unified under a single real-time platform Sigrow's willingness to go beyond standard products and engineer a custom solution turned an impossible deployment into a fully operational monitoring network. KEY TAKEAWAYS - Off-grid soil monitoring is achievable with the right engineering approach - Solar-powered sensor stations can operate 30+ days without sunlight - Custom solutions unlock deployments that off-the-shelf products cannot serve - Real-time remote soil monitoring scales globally with cellular connectivity --- ## 12. Case Study: Blom Kentia Palms — Mastering Growth Through Precision Data Source: https://sigrow.com/blog/case-studies/blom-kentia-palms-mastering-growth-through-precision-data/ CASE STUDY: Blom Kentia Palms — Mastering Growth Through Precision Data Industry: Horticulture Reading time: 2 minutes OVERVIEW Blom Kentia Palms is a family business that runs one of the most modern palm nurseries in Europe. Located in Aalsmeer, they supply customers worldwide with their Kentias. Sigrow's continuous data measurement was especially useful for their growth optimization. THE CHALLENGE Kentia palms are slow-growing and highly sensitive to changes in climate. Small deviations in temperature, humidity, or soil conditions can directly affect plant quality and uniformity. Before using Sigrow, Blom relied mainly on experience and periodic measurements, making it difficult to detect subtle but impactful climate differences inside the greenhouse. GOALS & OBJECTIVES - Gain continuous insight into plant and climate conditions - Understand how environmental factors affect crop performance - Improve consistency and overall plant quality - Make cultivation decisions based on data instead of assumptions THE SIGROW SOLUTION Sigrow installed advanced soil and air sensors directly in the greenhouse to continuously measure the plant's microclimate. What was measured: - Soil moisture and temperature - Air temperature and humidity - Light conditions around the crop This data was collected in real time, creating a complete picture of the growing environment throughout the day and season. DATA INSIGHTS & ANALYSIS The collected data revealed clear patterns that were previously invisible. Blom discovered that certain areas in the greenhouse experienced suboptimal conditions for photosynthesis, caused by uneven watering and light distribution. By analyzing trends over time, Sigrow helped identify where and when plants were under stress — allowing Blom to connect climate conditions directly to plant response. ACTIONS TAKEN - Irrigation schedules were adjusted to better match plant needs - Climate settings were fine-tuned to reduce stress fluctuations - Growing conditions were stabilized across different greenhouse zones RESULTS & IMPACT - Crop uniformity improved across the greenhouse - Growing conditions became more stable and predictable - Decision-making became faster and more confident - Plant quality improvements were visibly noticeable Sigrow's solution helped Blom move from reactive growing to proactive cultivation. GROWER TESTIMONIAL "Sigrow helped us understand what our plants are really experiencing. The insights allowed us to make small changes that had a big impact on quality." — Blom Kentia Palms KEY TAKEAWAYS - Continuous measurement reveals hidden climate issues - Small data-driven adjustments lead to better crop quality - Understanding the plant's microclimate is essential for consistent growth --- ## 13. Case Study: 38% Less Drain Water in Strawberries — Proefcentrum Hoogstraten Soil Mini Trial Source: https://sigrow.com/blog/case-studies/strawberry-drain-reduction-pch-sigrow-soil-mini/ CASE STUDY: How Proefcentrum Hoogstraten used Sigrow's Soil Mini to cut drain water by 38% on a free-draining tabletop strawberry crop — without losing yield or quality. Industry: Agriculture / Research Crop: Everbearing strawberry (cv. Karima) Location: Proefcentrum Hoogstraten (PCH), Meerle, Belgium Sigrow product used: Soil Mini substrate sensor Year: 2023 Research project: EU Life ACLIMA project (LIFE20-CCA-BE-1720) Reading time: 7 minutes OVERVIEW Sustainable water use is one of the biggest challenges in modern strawberry cultivation, and free-draining tabletop systems — the raised-table systems used across Northern Europe from April through September — are the toughest place to fix it. Water that exits these pots soaks into the soil below and is permanently lost. In 2023, Proefcentrum Hoogstraten (PCH), an independent research facility in Meerle, Belgium, ran a full-season trial with Sigrow Soil Mini substrate sensors to find out whether sensor-driven irrigation could safely reduce drain on a Mini-Air tabletop system with free drainage. The results were striking. By using continuous substrate moisture and EC data to steer irrigation in the second half of the season, PCH cut overall water use by 19.5% (from 520 to 419 L/m²) and reduced drain water by 38% (from 189 to 118 L/m²) — with no loss in yield, fruit size, firmness, Brix, or shelf life. Both sections produced roughly 2 kg per plant (about 10 kg/m²), with 75% of fruit graded as large. The drain fraction of applied irrigation dropped from 36.3% to 28.2%. And crucially, this was achieved even though sensor-driven irrigation only ran for the second half of the season — a full-season deployment would likely save more. THE CHALLENGE: FREE-DRAINING TABLETOP STRAWBERRIES ARE A WATER BLIND SPOT Over the past twenty years, Belgian and Dutch strawberry growers have made serious progress on sustainable water use. Most production greenhouses now recirculate drain water and capture rainwater on-site, often more than 3,000 m³ per hectare. Indoor production cycles are effectively closed. But one system has stayed stubbornly open: outdoor or covered tabletop cultivation with free drainage. These are the raised tables with grass underneath and no drain recovery — any water that exits the pots is gone. In standard strawberry fertigation, growers dose nutrients at low EC (typically 1.1–1.5 mS/cm) with every drip cycle and then steer the volume of water and the drip EC using the drain percentage and the drain EC. Target drain percentages range from 15% on dull days to 40% on bright, sunny days; target drain EC sits around 1.1–1.3 mS/cm for everbearers and around 1.5 mS/cm for June-bearers. Growers typically steer toward those values with light-integral triggers such as "give 100 ml per dripper for every 120 J/cm² of accumulated light." It works, but it's indirect — drain percentage and drain EC tell you what already happened inside the substrate hours earlier. Growers are steering by a rear-view mirror. And on free-draining tables, any drain percentage above zero is water permanently lost. GOALS & OBJECTIVES PCH designed the 2023 trial to answer a specific set of questions: - Can substrate sensors give growers enough confidence to safely reduce drain water on tabletop systems? - What moisture and EC thresholds in the substrate are safe limits before the crop suffers? - Does sensor-driven irrigation maintain or improve fruit yield, size, and quality? - Can the approach work with an everbearing variety like Karima, which is more sensitive to irrigation swings than June-bearers? THE SIGROW SOLUTION PCH purchased six Sigrow Soil Mini substrate sensors for the trial. Soil Mini is a portable, plug-and-play, rechargeable-battery-powered greenhouse substrate sensor that continuously measures: - Substrate moisture content (%) — the primary signal for irrigation decisions - Substrate EC (mS/cm) — nutrient concentration in the root zone - Substrate temperature - Ambient light - Vapor pressure deficit (VPD) For this trial, moisture and EC were the two parameters that drove decisions. The others were recorded in the background. TRIAL DESIGN: CONTROL VS TEST SECTION The trial ran on a Mini-Air tabletop system planted with the everbearing variety Karima on 29 March 2023. PCH split the six sensors evenly across two sections: - Control section: three sensors, irrigated from PCH's central technical room using the standard drain-steered strategy. - Test section: three sensors, irrigated from a separate dedicated fertigation unit that could be steered directly from sensor data. Because the trial used low Meerle trays (shallow tabletop containers), sensors could not be placed at multiple heights. Instead, each section placed one sensor in a root ball in the corner of the tray, one in a root ball in the middle of the tray, and one in the free substrate between root balls — giving a full picture of how moisture and EC moved through different zones. PHASE 1: LEARNING TO READ THE DATA (APRIL – MID-JULY) For the first ~3.5 months of the season, PCH deliberately irrigated the test section the same way as the control. The goal wasn't to save water yet — it was to learn how the sensor values behaved under a known traditional irrigation strategy. This phase did two important things: 1. It built a clear baseline of what "normal" substrate moisture and EC looked like across root balls and free substrate at different crop stages. 2. It caught a real operational problem on 28 June: the drain-EC measurements showed that the dedicated unit was suddenly dripping at very high EC because of an unexplained EC spike in the rainwater tank feeding that unit. The team drained the tank and refilled it with clean rainwater immediately. The short EC peak left a visible fingerprint in the substrate data for weeks afterward, especially in the sensor sitting in the middle root ball of the tray. Without continuous substrate monitoring, that contamination would likely have gone unnoticed. Phase 1 also surfaced a critical insight: substrate EC is less reliable than drain EC as a day-to-day steering signal. Substrate EC rose steadily over time, especially in the root balls, while drain EC stayed inside target. The two numbers told different stories, so the trial adjusted accordingly. PHASE 2: SENSOR-DRIVEN IRRIGATION (MID-JULY – END OF SEASON) From mid-July onward, the test section switched to sensor-driven irrigation. PCH established clear substrate moisture thresholds based on Phase 1: - Minimum 40% moisture in the root balls — the zone where active root uptake happens - Minimum 30% moisture in the free substrate between root balls — acceptable to dry back further, since there is less active root mass - Drain EC held between 1.1 and 1.3 mS/cm — the standard target range for Karima everbearers - Substrate EC allowed to climb freely, as long as drain EC stayed in target PCH did not automate the dedicated fertigation unit. Instead, staff checked substrate moisture data several times a week and made manual irrigation decisions: hold back water when moisture was above target, add a drip cycle when moisture approached the minimum, or increase water if drain EC began rising sharply. As a rule, PCH kept drip cycles to the minimum the crop actually needed, not the maximum the system allowed. DATA INSIGHTS & ANALYSIS The continuous sensor data made four things visible that drain-only monitoring had always hidden: 1. Moisture held up far better than expected. Even with significantly fewer drip cycles than the control, substrate moisture in the root balls stayed comfortably above the 40% target for most of the second half of the season. The crop had reserves in the substrate that drain-steered irrigation had been pushing through unnecessarily. 2. Drain percentages plunged below 5% at peak season. By late July the test section was running at drain percentages well under 5% — far below the traditional 15–40% targets — while drain EC stayed inside the target window. The crop was simply getting what it needed, without the built-in safety margin of extra water. 3. EC accumulation in the root balls became visible in real time. Substrate EC climbed steadily through the season, especially in the corner and middle root balls, reaching 8–9 mS/cm in September. Meanwhile drain EC stayed between 1.3 and 1.8 mS/cm. This reinforced the Phase 1 finding: in Karima on tabletop Mini-Air systems, substrate EC can drift high without drain EC showing it. Drain EC remains the more trustworthy day-to-day steering signal, but substrate EC is still valuable as a longer-term trend alert. 4. Irrigation timed to the crop, not the clock. Because moisture was visible in real time, irrigation decisions stopped being calendar-driven ("give a cycle every 120 J/cm²") and became response-driven ("give a cycle when moisture approaches 40% in the root ball"). On many days that meant fewer cycles; on a few hot days, more. Either way, it was precise. ACTIONS TAKEN - Shifted the test section from calendar-based drip scheduling to moisture-threshold–based scheduling starting mid-July - Reduced the number of daily drip cycles wherever root-ball moisture stayed above 40% - Added cycles proactively when drain EC started climbing - Detected and fixed the 28 June rainwater tank EC contamination before it caused lasting damage - Built a clear set of substrate moisture targets for Karima on tabletop Mini-Air systems that can be reused in future trials and commercial advice RESULTS & IMPACT Full-season numbers: Water use: - Control: 520 L/m² - Sensor-driven: 419 L/m² - Savings: 19.5% less water applied Drain water produced: - Control: 189 L/m² - Sensor-driven: 118 L/m² - Reduction: 38% less drain water lost Drain fraction of applied irrigation dropped from 36.3% in the control section to 28.2% in the sensor-driven section. And this reduction came even though sensor-driven irrigation only ran for half the season — a full-season deployment would likely save more. Yield and fruit quality — no trade-off: - Yield: both sections produced ~2 kg per plant (~10 kg/m²) - Fruit size: 75% of fruit graded as large in both sections - Firmness: no measurable difference - Visual quality: no measurable difference - Brix (sugar content): no measurable difference - Shelf life: no measurable difference The crop didn't notice. It produced the same weight, the same size distribution, and the same quality on 19.5% less water and 38% less drain. KEY TAKEAWAYS - Substrate sensors turn drain reduction into a data-backed decision, not a guess. On free-draining tabletop systems where every drop of drain is permanently lost, this is an immediate sustainability lever. - Substrate EC is less reliable than drain EC as a day-to-day steering signal. Substrate EC climbs slowly in the root balls (up to 8–9 mS/cm in this trial) while drain EC stays in target — use drain EC for day-to-day steering and substrate EC as a longer-term trend alert. - A minimum 40% moisture threshold in the root ball (and 30% in the free substrate) was a safe and effective floor for Karima everbearers on Mini-Air tabletop — the crop held yield, size, firmness, Brix, and shelf life under those limits. - Continuous monitoring catches operational problems early. The 28 June rainwater tank contamination would likely have gone unnoticed without continuous substrate EC data. - Everbearing strawberries, traditionally considered more sensitive to irrigation swings than June-bearers, tolerated sensor-driven irrigation without any loss in quality. ABOUT PROEFCENTRUM HOOGSTRATEN Proefcentrum Hoogstraten (PCH) is an independent horticultural research facility in Meerle, Belgium, specialising in applied research for greenhouse and tabletop fruit and vegetable crops. PCH runs multi-season trials for commercial growers, breeders, and EU research projects, and is widely recognised across Belgium and the Netherlands as a practical, grower-facing research centre. ABOUT THE LIFE ACLIMA PROJECT The trial was run as part of the EU Life ACLIMA project (LIFE20-CCA-BE-1720), a European research programme focused on climate adaptation in agriculture. Life ACLIMA supports trials that test practical technologies for reducing water and energy use in horticulture under the pressure of climate change. REFERENCE The results of this trial were published in the Belgian horticultural magazine Proeftuinnieuws: P. Melis, S. Laurijssen, M. Hofkens & V. Greffe (Proefcentrum Hoogstraten, Meerle), "Drain in aardbeien te beperken met behulp van sensoren", Proeftuinnieuws 20, 24 November 2023, pages 11–13. This independent, peer-facing magazine publication makes the trial results an externally vetted reference for growers evaluating sensor-driven irrigation on free-draining strawberry systems. --- ## 14. Case Studies Index Source: https://sigrow.com/case-studies/ Success Stories — Real Success Stories From Our Clients Verified results show how Sigrow's data-driven insights and smart solutions have transformed greenhouse performance, improving crop health, efficiency, and yields with measurable impact. Categories: All / Research / Horticulture / Agriculture CASE STUDIES LISTED: 1. Off-Grid Solar-Powered Soil Monitoring Worldwide (Agriculture / Research, 2 min) A large international agricultural company manages crop operations across more than 100 locations worldwide. Many of these sites are in remote areas with no access to electricity or fixed infrastructure. Sigrow engineered a custom solar-powered monitoring solution so they could track soil conditions from anywhere in the world. 2. AI-Powered Powdery Mildew Detection in Snack Cucumbers (Agriculture, 3 min) Sigrow deployed AI-powered disease detection in a major Dutch snack cucumber greenhouse. Using thermal imaging and stomatal analysis, the system catches powdery mildew days before visible symptoms — enabling targeted crop protection instead of blanket spraying. 3. Blom Kentia Palms — Mastering Growth Through Precision Data (Horticulture, 2 min) Blom Kentia Palms is a family business that runs one of the most modern palm nurseries in Europe. Located in Aalsmeer, they supply customers worldwide with their Kentias. Continuous data measurement was especially useful for their growth optimization. 4. 38% Less Drain Water in Strawberries — Proefcentrum Hoogstraten Soil Mini Trial (Agriculture / Research, 7 min) Proefcentrum Hoogstraten (PCH) in Meerle, Belgium ran a 2023 full-season trial on an everbearing Karima strawberry crop grown on a free-draining Mini-Air tabletop system. Using six Sigrow Soil Mini substrate sensors, PCH switched the test section to sensor-driven irrigation from mid-July, cutting overall water use by 19.5% and drain water by 38% with zero loss in yield, fruit size, firmness, Brix, or shelf life. Published in Proeftuinnieuws 20 (November 2023). Research project: EU Life ACLIMA (LIFE20-CCA-BE-1720). --- ## 15. Blog Index Source: https://sigrow.com/blog/ Our Blog — Insights from the Greenhouse Practical growing knowledge from Sigrow's plant scientists and the growers we work with. From managing VPD and screen strategies to interpreting sensor data for root zone health — these articles cover the real challenges inside the greenhouse and how data helps solve them. Categories: All / Sensors & Data / Grower Insights ARTICLES: 1. "Suboptimal crop activity: a hidden risk in high-wire cultivation" Category: Grower Insights By Mihnea Paraschiv, April 8, 2026 (2 minutes) Summary: Learn why greenhouse climate stability is critical for plant growth. 2. "How uniform is your greenhouse climate" Category: Grower Insights By Rutger Vreezen, April 8, 2026 (1 minute) Summary: Learn why greenhouse climate uniformity is critical for plant growth, yield, and disease prevention. 3. "Which System do you trust more" Category: Sensors & Data By Mihnea Paraschiv, April 8, 2026 (2 minutes) Summary: Thermistor or crop sensors? Learn which measurement system gives better insights into plant condition. 4. "Spring is a favorite season in horticulture" Category: Grower Insights By Rutger Vreezen, April 8, 2026 (1 minute) Summary: Spring is a key season in greenhouse cultivation. Learn how to manage plant growth in spring. 5. "Autumn cultivation: the most challenging season for growers" Category: Sensors & Data By Mihnea Paraschiv, April 8, 2026 (2 minutes) Summary: Autumn cultivation is the most challenging season for greenhouse growers. 6. "Energy Prices Are Rising Again Worldwide Activity" Category: Sensors & Data By Mihnea Paraschiv, April 8, 2026 (2 minutes) Summary: Energy prices are rising again. Learn how Dutch greenhouse growers reduce energy use. --- ## 16. Blog: How uniform is your greenhouse climate Source: https://sigrow.com/how-uniform-is-your-greenhouse-climate/ Category: Grower Insights By Rutger Vreezen • April 8, 2026 • 1 minute BLOG POST: How uniform is your greenhouse climate? Climate uniformity and air movement inside the greenhouse are receiving increasing attention within the horticulture industry. Achieving a uniform climate is not only a technical objective, but is also closely linked to crop performance and fruit quality. Last week, the author visited Mike Zuidgeest's location together with Peter Van Weel, Hein Jasperse and Rob van Hulzen to carry out a smoke test as part of a project led by Peter Van Weel. The goal is to optimise cucumber fruit quality by gaining better insight into greenhouse airflows, temperature distribution and crop transpiration rates. During the test, they examined the interaction between screen gaps, air mixing, ventilation, above-screen temperature and LED-lighting strategies. Rutger Vreezen represented Sigrow as a collaboration partner in this project, alongside Priva Horticulture and Van der Ende Group. Sigrow's contribution is providing advanced climate measurements using the Sigrow sensor systems. Gaining a better understanding of the greenhouse climate is an important step towards increased energy efficiency and improved quality outcomes. --- ## 17. Blog: Which System Do You Trust More — Thermistor vs Crop Sensors Source: https://sigrow.com/which-system-do-you-trust-more-the-thermistor/ Category: Sensors & Data By Mihnea Paraschiv • April 8, 2026 • 2 minutes BLOG POST: Which system do you trust more — the thermistor in your home heating system, or the climate control system that manages your greenhouse? Proper placement of your home's heating thermistor is important, as it directly affects how comfortable you feel. It's recommended to mount it on an interior wall, away from outside walls or windows. A bedroom is not uniform and it is not expected to be uniform. Areas near windows and exterior walls are typically cooler in winter and warmer with solar gain, while interior zones better represent the average room condition. If you place the sensor in the wrong spot, you collect biased data, and the system controls to the wrong temperature. Now consider this: even in a small bedroom, we expect a typical 1–2 °C temperature difference within the space. So why do growers often treat greenhouses, which are vastly bigger and more complex than a bedroom, as uniform environments? In recent discussions with growers during "Data-Discovery meetings," Sigrow reviews the temperature gradients within their greenhouses. A common situation is when a grower explains that one climate box per hectare is sufficient. Sigrow encourages them to install additional sensors. What happens next? We always discover that within a single hectare, previously considered uniform, there can be temperature differences of up to 8 °C, creating cold spots with higher humidity and warmer areas that are significantly drier. Despite these variations, many growers still rely on a single reading, typically from the center of the greenhouse, to control the entire compartment. A non-uniform climate can lead to uneven crop growth, differences in plant development stages, increased disease pressure in wetter zones, and higher stress in warmer, drier areas. It can also result in inefficient energy use, as the system may overheat some sections while underheating others. Ultimately, this variability affects yield consistency, product quality, and overall operational performance. So what can you do? At Sigrow, we work with growers to reduce climate non-uniformity in their greenhouses. The first step: collecting more data. Specifically, Sigrow recommends installing around 16 temperature, humidity and PAR sensors per hectare, placed in a 4×4 grid, to properly capture climate variation. Once this data is gathered, the heatmap module in the Sigrow app helps identify and analyze areas of inconsistency. Common causes of climate non-uniformity: - Doors being opened too frequently - Very cold irrigation water - Screen gaps when done improperly - Ventilation opened on only one side After identifying the root causes, Sigrow works with growers to define corrective actions, leading to a more uniform and controlled greenhouse climate. --- ## 18. Blog: Suboptimal Crop Activity — A Hidden Risk in High-Wire Cultivation Source: https://sigrow.com/greenhouse-climate-stability-why-it-matters-for-growers/ Category: Grower Insights By Mihnea Paraschiv • April 8, 2026 • 2 minutes BLOG POST: Suboptimal crop activity: a hidden risk in high-wire cultivation In recent "Data Discovery" meetings with vegetable growers across North America and Europe, one topic keeps returning: vapor pressure difference (VPD). Growers monitor it. But what actually happens inside the plant when VPD moves outside its optimal range? WHY VPD MATTERS VPD determines how strongly the air pulls moisture from the crop. - Higher VPD → more moisture pulled from the leaf → higher transpiration - Lower VPD → less moisture pulled → lower transpiration But plants have limits. Above approximately 1.5 kPa, stomata begin to close to prevent dehydration. Once that happens: - Transpiration becomes restricted - CO₂ uptake declines - Photosynthesis is reduced, even under good light conditions The optimal crop VPD range is generally 0.3–1.5 kPa. Outside this window, crop performance starts to suffer. WHAT HAPPENS WHEN VPD IS TOO LOW? Low VPD reduces transpiration. That directly impacts calcium transport, because calcium is immobile and depends entirely on transpiration flow. Possible consequences: - Fruit cracking - Blossom end rot - Tip burn - Increased susceptibility to Botrytis and inner rot Moreover, during the night, if VPD remains below 0.5 kPa, water accumulates inside the plant, and morning guttation may occur, increasing fungal disease pressure. WHAT HAPPENS WHEN VPD IS TOO HIGH? When VPD exceeds 1.5 kPa: - Stomata close - CO₂ uptake decreases - Photosynthesis becomes CO₂-limited The crop may look active, but physiologically it is restricted. SEASONAL REALITY - In summer, high VPD is often the main concern - In late autumn, winter, and early spring, low VPD caused by humid air is usually the greater challenge HOW TO MANAGE IT PROPERLY At Sigrow, we take a crop-centric approach to climate management, measuring what the plant actually experiences rather than just the air around it. The goal is to avoid unstable microclimates and sudden plant temperature drops, keeping VPD within the optimal range. Key focus areas to increase VPD: - Prevent cold air drops through screen gaps - Avoid cold screen surfaces - Reduce radiation loss - Fine-tune venting - Optimize dehumidification By measuring leaf temperature and VPD directly, climate decisions can be based on what the crop truly experiences. Using the Sigrow Stomata Camera and AI-driven plant segmentation, we work with growers to analyze data and translate it into practical strategies that stabilize microclimates and improve crop performance. --- ## 19. Blog: Spring is a Favorite Season in Horticulture Source: https://sigrow.com/spring-is-a-favorite-season-in-horticulture/ Category: Grower Insights By Rutger Vreezen • April 8, 2026 • 1 minute BLOG POST: Spring is a favorite season in horticulture Spring is a favorite season in horticulture because of the increase in radiation, but for some crops it also brings a new layer of complexity. Pepper is a good example. Pepper plants are particularly sensitive to higher radiation and increasing temperatures in spring. Compared to crops like tomato or cucumber, pepper has a relatively low transpiration rate. This means the plant has less natural cooling capacity. The result? Fruit temperatures can rise quickly. When the fruit overheats and cannot dissipate heat, it becomes vulnerable. In practice, this can lead to fruit burn and create entry points for infections. Traditionally, growers manage this with screening strategies. But to do that effectively, you need reliable fruit temperature data. That's where it gets tricky: point sensors struggle because the crop is constantly moving and developing. What growers actually need is continuous, accurate insight into fruit and leaf temperature, separately. In practice, what Sigrow sees with pepper growers is a shift toward vision-based monitoring. Using the Sigrow Stomata Camera (AI-powered thermal imaging), growers can automatically detect and distinguish fruits and leaves, measure their temperatures in real time, and couple the data to the climate computer to steer directly via Priva Horticulture, Hoogendoorn Growth Management, and Ridder. Interestingly, even camera placement turned out to be a challenge. Pepper plants tend to grow leaves over the fruits, which makes recognition difficult. Together with growers, Sigrow fine-tuned the setup. The most reliable results were achieved by positioning the camera at a 90-degree angle from the side, improving visibility and detection accuracy. --- ## 20. Blog: Autumn Cultivation — The Most Challenging Season Source: https://sigrow.com/autumn-cultivation-challenges-in-greenhouses/ Category: Sensors & Data By Mihnea Paraschiv • April 8, 2026 • 2 minutes BLOG POST: Autumn cultivation — the most challenging season for growers After an unusually warm summer across much of the world, conditions are shifting: lower temperatures, more rain, and reduced radiation. For growers, this means adapting the cultivation strategy from summer mode to autumn/winter mode. Easier said than done. Autumn is one of the most difficult periods in cultivation. The risk of fungal disease increases dramatically, mainly due to two processes: - Condensation (air depositing water on leaves) - Guttation (plants pushing water out through their leaves) Condensation is well known, but guttation deserves more attention. In recent "Data-discovery meetings" with growers from Western and Northern Europe, Sigrow discussed the role of screen opening and closing strategies, and how these impact greenhouse climate. Using Sigrow sensors, especially the Stomata Camera and Net Radiometer, we can clearly see how sensitive plants are during this period. WHAT IS GUTTATION? Guttation happens when water pressure builds up inside the plant and cannot be released through transpiration, especially at night when stomata are closed. Root pressure forces water out through special leaf structures (hydathodes), forming droplets. This is most visible in the morning when screens are opened and conditions rapidly change. TYPICAL SCENARIO: 1. During the night, transpiration is very limited, often below 20 g/m²/h, because of the low VPD (< 0.5 kPa). Water slowly accumulates inside the plant. 2. In the morning, PAR > 0, and the grower opens the screens. 3. Cold air from above the screen drops onto the crop, causing a cold dip in plant temperature. 4. At the same time, light drives plants to transpire, but the leaves are still cold while roots remain active, pushing water upward. 5. The plant cannot transpire efficiently, so guttation occurs. HOW TO PREVENT GUTTATION? One proven approach is adjusting the screen opening strategy: - 0% to 18%: steps 0% → 2% → 4% → 6% → 18% (15 minutes between each step) to avoid cold air drop - 18% to 100%: open the last 82% within 15 minutes This gradual process prevents cold air from dropping on the crop all at once, allowing it to warm before reaching the plants. It also reduces radiation loss towards the greenhouse roof, preventing additional cooling. The result: a smoother climate transition, lower risk of guttation, and healthier crops. --- ## 21. Blog: Energy Prices Are Rising Again Worldwide Source: https://sigrow.com/energy-prices-are-rising-again-worldwide-activity/ Category: Sensors & Data By Mihnea Paraschiv • April 8, 2026 • 2 minutes BLOG POST: Energy Prices Are Rising Again Worldwide Energy prices are rising again worldwide, putting pressure on businesses to reduce energy consumption. For greenhouse horticulture this is especially critical, as margins are tight and energy is one of the largest operational costs. For Dutch growers, this challenge is not new. During the 2022 energy crisis, prices skyrocketed and many growers struggled to stay profitable. Energy reduction quickly became the main focus: how can we grow the same crop using less energy? Once growers started using crop sensors and data more actively, many discovered there was significant room to reduce energy use. A clear example was night-time heating. Many greenhouses maintained relatively high heating levels at night, resulting in crop VPD values around 0.4–0.6 kPa. In many cases this proved unnecessary. Lower heating and a calmer night climate allowed plants to recover better while saving substantial amounts of energy. The sector responded through innovation. Growers adapted their strategies using a combination of approaches: - Switching from HPS to LED lighting - Installing additional energy screens and using them more hours - Reducing minimum pipe temperatures At the same time, concepts like Plant Empowerment Academy gained traction, focusing on balancing energy, water, and assimilates so plants can regulate themselves more effectively. An important shift was moving from air-based measurements to crop-centric measurements such as crop temperature and crop VPD. These help growers understand how the plant actually experiences the climate and how far energy reductions can go without harming crop performance. This is where sensor technology plays a role. Tools such as the Sigrow Stomata Camera measure crop temperature and crop VPD, while a Net Radiometer measures the crop's energy balance. With these insights, growers can optimize heating, ventilation and screen use while preventing issues like condensation, guttation or reduced plant activity. With energy prices rising again globally, greenhouse operations should closely examine their energy use. The Dutch greenhouse sector has already shown what is possible. --- ## 22. Blog: Blossom End Rot in Tomatoes — It's a Transpiration Problem, Not a Nutrition Problem Source: https://sigrow.com/blog/blossom-end-rot-tomatoes-transpiration/ A tomato grower called with a familiar problem: blossom end rot, no obvious stress, irrigation looked fine, calcium levels in order. The answer was not in his irrigation schedule. It was in what had happened a few days earlier, on a cold, clear spring night. Calcium moves through transpiration — and only through transpiration The day before had been warm and sunny. The substrate was at temperature. Roots were active. The crop was growing well. Then the sun set. The outside temperature dropped quickly. The greenhouse cover cooled rapidly through radiation to the cold night sky. The crop surface cooled with it. Transpiration stopped. And when transpiration stops, calcium transport stops with it. Calcium moves almost exclusively through the transpiration stream. No flow, no supply. The developing fruit at the blossom end received no more calcium. Cell walls weakened. The damage was done quickly. Blossom end rot is not a nutrition problem. It is a transpiration problem. The mechanism: radiation on clear spring nights Radiation is driven by the temperature difference between the crop and the surface it sees above it. On a clear spring night without proper screen setting, that surface is the greenhouse cover — and it is cold. Crop temperature drops. VPD drops. Transpiration drops. Roots remain warm, the plant keeps growing, but calcium no longer moves. What often goes wrong in practice: screens are only half-closed, leaving the cold cover visible to the crop. Venting is shut down completely to save energy, causing humidity to build up and VPD to drop further. The climate computer shows RH within range — but the developing truss tells a different story. What well-run greenhouses actually do Growers who handle this well, using a double-screen setup, follow a consistent approach. First, open vents on both windward and leeward sides — not to cool the house but to remove moist air and maintain a VPD that keeps a continuous, light transpiration through the night. Then close the upper screen fully and the lower screen to about 80–95%. Warm greenhouse air rises through the opening in the lower screen and collects between the two layers, warming both screens from inside. The crop sees the underside of the lower screen instead of the cold cover above. Radiation is reduced. Calcium keeps moving. The conclusion Spring blossom end rot is not always a fertilization problem. It can be a climate management problem — a problem that began on a clear night, days before the damage became visible. By the time you see the symptoms, the cause is already in the past. Monitoring crop temperature, VPD and screen position through the night gives you the data to act before damage occurs. How Sigrow helps The Stomata Camera measures crop temperature and VPD at crop level — continuously, including at night. Growers can see radiation, dropping transpiration and stalled calcium transport before damage becomes visible in the truss. Written by Ing. Timon van Lemmen. --- ## 23. Free Greenhouse Tools & Calculators Source: https://sigrow.com/tools/ Free, interactive greenhouse tools — no login required. Each tool runs in the browser and exists in every site language (Dutch versions: https://sigrow.com/nl/tools/). ### VPD Calculator and VPD Chart for Greenhouses URL: https://sigrow.com/tools/vpd-calculator/ Enter air temperature and relative humidity to get the vapor pressure deficit (VPD) in kPa, with a live VPD chart and the ideal ranges. A calculator or a VPD chart describes one set of conditions at one moment; a real greenhouse has dozens at once — the aisle, the crop head, the damp pocket under the screen — which is why growers pair a calculator with canopy-level measurement (Pixel, Stomata Camera). ### Dew Point Calculator for Greenhouses URL: https://sigrow.com/tools/dew-point-calculator/ Enter air temperature and humidity to get the dew point and the dew point depression, and see which nights and hours surfaces risk condensing — the moment leaves go wet and Botrytis and downy mildew pressure starts. ### DLI and Supplemental Light Calculator URL: https://sigrow.com/tools/dli-calculator/ See how much daily light (DLI) your crop actually gets from the real sky at your location, through your greenhouse cover, and how many lamp hours you need to reach your DLI target. ### Greenhouse Heat Stress Management Tool URL: https://sigrow.com/tools/greenhouse-heat-stress-management/ Opens on today's conditions at your location: see how a real heatwave, today and the coming days, drives crop leaf temperature, and test venting, screening and fogging before applying them in the greenhouse. --- ## 24. Contact Information Source: https://sigrow.com/contact-us/ Contact Us — Get in Touch Questions, assistance, or just want to chat about optimizing your cultivation? Sigrow's plant scientists are ready to support you. READY TO SEE YOUR PLANTS DIFFERENTLY? Request a personalized demo and discover how the Stomata Camera can transform your growing operation. Demo request form fields: - Full Name - Company / Greenhouse - Phone Number - Email Address - Primary Crop CONTACT INFORMATION Email: success@sigrow.com (for general inquiries) Phone: +31 6 450 500 55 (9AM to 6PM CET) Office: Hoofdkwartier 86G, 6711 WW Ede, The Netherlands Business Hours: Monday – Friday: 9:00 AM – 6:00 PM CET, Saturday–Sunday: Closed Sales Inquiries: success@sigrow.com (for product demonstrations and enterprise solutions) Support: support@sigrow.com (available 9 AM till 9 PM CET) WhatsApp: +31 6 450 500 55 ---