Relative Humidity

Relative humidity (RH) is not a terpene, but rather an environmental condition that significantly influences terpene expression and preservation in cannabis plants. During cultivation, RH levels affect how volatile aromatic compounds accumulate in trichomes and their stability post-harvest. Breeders and cultivators monitor RH because it directly impacts the final aromatic profile—higher humidity during flowering can suppress volatile terpene development, while rapid drying at low RH may cause terpene degradation. After harvest, proper RH management (typically 55-65%) is critical for long-term terpene retention during storage and curing. Understanding RH as a cultivation variable helps explain why the same genetic can express different aromatic characteristics under different environmental conditions.

Breeders working with terpene-dominant strains must account for RH as a control variable when phenotype-testing and stabilizing lines. Cultivation protocols standardizing RH allow more accurate assessment of genetic terpene potential versus environmentally-induced aromatic variation.