What's VPD

Vapor Pressure Deficit (VPD) is the difference between the current amount of moisture in the air and the maximum amount of moisture the air can hold when it is fully saturated at a given temperature. This measurement is expressed in kilopascals (kPa) and reflects the dryness of the air relative to its temperature.

How to Lower VPD

Increasing the humidity and controlling the temperature could lower the VPD effectively.

How to Increase VPD

When VPD is below the ideal level, lowering the humidity and controlling the temperature could increase the VPD effectively. Using a dehumidifier or installing an air conditioner.

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