Vapor Pressure Deficit (VPD) is a proven tool that can maximize your desired results when growing in a controlled environment. Our VPD chart suggests optimal ranges to run your plants during the different stages of growth.
Dialing in a proper VPD in your grow will help to reduce issues brought on by either too much transpiration, aka high VPD values, or the plants inability to transpire enough, AKA low VPD values.
Making sure the VPD isn’t to low where the plants are unable to evaporate enough water to encourage the transport of nutrients is very important for plant health. In cases where VPD is extremely low, water condensation can provide a situation for fungal growth and other diseases, which is exactly what we are trying to prevent.