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.
🔊 VAY·per PRESH·er DEF·ih·sit
In the Wild — Example
Dialing in vapor pressure deficit was the single most impactful change I made to my environmental controls.
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