Foliar Applications

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Optimizing Foliar Feeding with Leaf VPD Monitoring

What’s Leaf Vapor Pressure Deficit (VPD)?
Leaf Vapor Pressure Deficit (VPD) is a crucial indicator of your plants' ability to regulate water and nutrient intake. It measures the difference between the moisture inside the leaf and the surrounding air, showing how efficiently the plant 'breathes' and transpires. When Leaf VPD is in the ideal range, your plants lose just the right amount of water, maintaining a balance that allows optimal nutrient uptake during foliar feeding. This means that nutrients can be absorbed through the leaf surface without the risk of nutrient runoff or underfeeding. By monitoring and adjusting to the perfect Leaf VPD, you can ensure your plants are ready to absorb nutrients effectively, promoting stronger growth and reducing waste.
How is Leaf VPD Measured?
Our sensors track real-time leaf VPD data to ensure your plants are in their optimal moisture zone. The system continuously measures humidity and temperature to calculate VPD, giving you clear indicators of when your plants are stressed or in balance. With this data, you can adjust your foliar feeding times to ensure nutrients are delivered when your plants can absorb them best, without the risk of over-feeding or under-feeding.
How Can the Data Help You Make Decisions?
Leaf VPD monitoring allows you to time your foliar feeding with precision, ensuring plants are in the ideal condition to absorb nutrients. For example, with strawberries, maintaining the right humidity and VPD range is crucial to maximize yield potential and promote healthy growth. In strawberries, an ideal relative humidity of 60-75% results in a Leaf VPD range of 0.3-1.2 kPa, depending on temperature. When VPD is within this range, plants are more receptive to foliar feeds, allowing nutrients to be effectively absorbed through the leaves. By tracking Leaf VPD, you can apply foliar feeds at optimal times, maximizing nutrient uptake, reducing waste, and supporting stronger, healthier crops across different plant types.
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What Sensors Do You Need?

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Leaf Wetness Sensors
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Air Temperature and Humidity Sensors
What's Included in Your Subscription:
Start with our basic package at just $8.99 per sensor/connection. For added support, you can customize your subscription with optional add-ons.:

  • Sensor Repair and Replacement Service (Intermediate plan): Our proactive monitoring ensures that any faulty sensors are quickly repaired or replaced. With our Sensor Repair and Replacement add-on, your sensors are insured, guaranteeing optimal performance and high uptime. If any issues arise, we’ll handle repairs or replacements promptly, ensuring a continuous flow of critical data for effective crop management.
  • Training and Support (Advanced Plan): Receive comprehensive training and ongoing assistance, including 1-on-1 personalized weekly meetings. This support helps you understand and effectively use data, adopt better data practices overall, and maximize the value of our system, empowering you to make informed decisions for your crops.