Terroir Genetics

Terroir Genetics refers to the concept that cannabis phenotypes and chemical profiles are shaped by cultivation environment—soil composition, altitude, climate, light exposure, and microbial communities—rather than genetics alone. Breeders and cultivators working within this framework document how identical genetics can express different terpene ratios, cannabinoid concentrations, and plant structures across distinct growing regions. This approach draws parallels to viticulture and specialty agriculture, where 'terroir' describes how geography influences final product character. Terroir-focused breeding programs often stabilize genetics in specific environmental conditions to create region-specific expressions, then evaluate stability across different climates. Understanding terroir is relevant for seed banks and cultivators seeking to predict and replicate consistent phenotypes.

Breeders using terroir principles deliberately grow test populations across multiple environments to identify which traits are genetically fixed versus environmentally plastic. This data helps determine realistic phenotype ranges and guides selection for stability or adaptability to regional growing conditions.