Relative Humidity Rh

Relative humidity (RH) is not itself an aroma, but rather an environmental factor that significantly influences how cannabis plants develop and express volatile compounds. RH levels during cultivation—particularly during flowering—affect terpene production, cannabinoid profiles, and the intensity of aromatic expression. Breeders and cultivators monitor RH because it shapes the phenotypic expression of a strain's genetic potential for aroma. Environmental stress from improper humidity can suppress volatile production or encourage different metabolite pathways. Understanding RH's role is essential for consistent, reproducible cultivation and preservation of a strain's intended aromatic character.

Breeders document RH ranges that optimize volatile expression for their lines, as humidity stress during flower can suppress or alter terpene profiles. Seed banks and cultivators control RH to reliably express a strain's genetic aromatic traits across growing environments.