Multi Environment Trials

Multi-Environment Trials (METs) refer to structured breeding and evaluation protocols where cannabis cultivars are grown across diverse geographic locations, climate conditions, and cultivation systems simultaneously. Breeders and seed companies conduct METs to assess how genetic lines perform under varying environmental pressures—altitude, photoperiod, humidity, soil composition, and temperature ranges. This data helps identify phenotypic stability, regional adaptation patterns, and which traits remain consistent versus environment-dependent. METs are foundational to cannabis breeding science, allowing researchers to distinguish genuine genetic merit from environment-induced variation. Results inform cultivar recommendations for specific growing regions and climate zones. Understanding MET outcomes is essential for developing regionally appropriate genetics and stable F1 hybrids.

Breeders use MET data to select parents with phenotypic consistency across environments, identify location-specific adaptations, and validate breeding line stability before commercialization. Seed companies rely on MET results to make region-specific cultivar recommendations and predict performance in customer growing conditions.