Like most websites, 30MHz uses cookies to remember you so that we can deliver an optimised browsing experience. Select ‘Accept all’ if you’re okay with accepting cookies from UserEngage (webchat and lead generation), Hotjar (website improvement) and LinkedIn (tailored ads). When you select ‘Accept only necessary’, we will place cookies that let you use our website properly by remembering your preferences and for anonymous statistics. For more information, please see our cookie policy and privacy notice.

Accept all
Accept only necessary

VPDleaf: even more accurate insight into VPD

May 19, 2022

VPD is an important value because it can tell you how a plant is feeling. VPD stands for Vapour Pressure Difference. At 30MHz, we express this in VPDleaf. This visualization shows the data from our wireless sensors even more accurately, which provides better insight into the health of your crop.

What is VPDleaf?

VPDleaf is extremely reliable because the measurements are taken at micro level, all the way down to plant level. Using these measurements and an improved formula, a grower will have the most accurate data possible at his disposal. The improved formula – which leads to VPDleaf – is endorsed by WUR (Wageningen University & Research).

VPDleaf infosheet

How do you measure VPDleaf and how can you benefit as a grower? Leave your details and find the answers in the VPDleaf information in your inbox.

Why is VPD important in horticulture?

If the VPD is zero, plants can not transpire effectively. So the VPD is an important factor in creating an optimal growing environment. It can influence various key elements, which are connected to each other. As VPD increases:

  • The uptake of CO2 decreases
  • The increasing difference in vapor pressures between the leaf and the air causes the crop to evaporate
  • VPD increase → transpiration increase → thirst! The plant needs to draw more water from its roots
  • All this combined, leads to more stress. And that could lead to a weaker plant.

So VPD affects the plants loss of water (transpiration). Sometimes the air in a greenhouse gets too dry during the day. This can cause a plant to ‘turn off’. When the air is too dry, photosynthesis will stop to prevent the plant from exhausting. Photosynthesis is the process used by plants to convert sunlight, water and CO2 into oxygen and energy that is used for the growth. The crop will miss hours of daylight which leads to a decline in health. An optimum VPD can help in the prevention of mold and plant diseases.

VPD sensor in a greenhouse monitoring basil.

Pointed Microclimate Sensor: Measuring VPD in a greenhouse.

Research in tomato production in 2017 showed that VPD regulation efficiently moderated plant water stress and maintained the plants water balance. The researchers concluded that when you regulate the VPD, you’ll be more efficient with irrigation.

Pointed Micro Climate sensor

This sensor uses leaf temperature and temperature humidity measurements to continuously capture microclimate at close range. Use data from the sensor to better determine heating needs, cutting unnecessary energy expenditures and lowering the risk of plant fungus and disease.

A lot of our customers use this sensor for measuring VPD and dew point.

Specifications Pointed Micro Climate sensor

How can we help you digitise your cultivation process?
Analyse all kinds of information from different data sources such as climate computers, sensors and manual input in a central platform. Improve the production process of your crops, plants, seeds or bulbs together with advisors, distributors and researchers. We are happy to talk to you about which service model is most suitable for your company.

30MHz is typing… Our extended support team is ready to chat!

At 30MHz we think it’s important that our users can use our platform in an optimal way. At times you may have questions and you would like some help from our support team. Email and our support page filled with helpful articles were your go to’s. But we thought it was time for something extra… ...
Read more

Eurofins and 30MHz: all your crop and climate data on 1 dashboard

Data of your crop, its soil and the surrounding climate all together on one central and digital dashboard. This will become reality for growers. It’s the result of a new partnership between Eurofins and 30MHz. The organisations join forces to stimulate data driven horticulture. Soil and water analysis for horticultural businesses is one of Eurofins ...
Read more

The same yield with less water and fewer fertilisers

The right amount of water is essential for a healthy crop, and as an added bonus it’s more sustainable too. The 30MHz Irrigation Management app gives every grower control over their irrigation, and backs up instinct with reliable data. Thanks to this innovation, a crop gets exactly the quantity of water it needs. 30MHz presents ...
Read more