Parts of a cannabis plant are described as tiny crystals covering the marijuana buds and the structure of the cannabis plant, including the fan leaves, sugar leaves, and bract. Trichomes form a sticky layer covering the flower. Cannabis flowers that haven’t been pollinated usually have more trichomes, thus having more potent terpenes and cannabinoids. Besides producing cannabinoids and terpenes, trichomes serve another important function in the structure of the cannabis plant. The stickiness of the trichomes helps protect the marijuana plant from insects and predators as the plant grows. The trichomes even help protect the plant from the sun’s UV rays.
Vapor Pressure Defecit (VPD)
VPD is the difference between the amount of water vapour that the atmosphere is able to retain (which depends on temperature) and the amount of water vapour contained in it (relative humidity). It is usually measured in kilopascals (kPa).