Terroir

Terroir in cannabis breeding refers to the environmental expression of a plant's genetic potential—how soil composition, climate, altitude, and growing conditions influence terpene profiles and phenotypic expression. Unlike a single terpene, terroir describes the interaction between cultivar genetics and cultivation environment. Breeders working across different regions often observe that the same genetic line produces distinct aromatic and chemical profiles depending on where it's grown. This concept has become increasingly relevant as cannabis cultivation moves toward controlled-environment agriculture (CEA) and outdoor production in diverse microclimates. Understanding terroir helps explain phenotypic variation within seed populations and informs breeding decisions about strain stability and regional adaptation.

Breeders document terroir effects when selecting parent plants for crosses, as environmental consistency affects trait reliability in offspring. Seed companies often test cultivars across multiple growing regions to identify which genetics maintain stable terpene profiles—a key marker of breeding success and marketability.