Abbreviation for Vapor Pressure Deficit. A measurement used in cannabis cultivation to describe the difference between the moisture content of the air (humidity) and the amount of moisture the air can hold at a given temperature. This metric is essential for understanding the balance between temperature and humidity in the grow environment, directly influencing how cannabis plants absorb water and nutrients. Optimizing VPD helps to maximize plant growth, enhance nutrient uptake, and prevent issues like mold by creating ideal conditions for transpiration and evaporation.
🔊 vee·pee·dee
In the Wild — Example
Running VPD in the optimal range for each growth stage dramatically improved my yield and resin production.
Have a better example? Suggest one.