Multi Environment Trials

Multi-environment trials (METs) are standardized testing protocols where cannabis cultivars are grown across multiple distinct geographical locations, climates, and controlled settings simultaneously. These trials document how genetic expression varies under different environmental conditions—such as temperature ranges, humidity levels, altitude, and photoperiod—allowing breeders to assess phenotypic stability and identify genetically consistent traits. METs generate crucial data on yield potential, cannabinoid profiles, terpene expression, and growth patterns across environments, helping distinguish true breeding characteristics from environmentally-induced variations. By growing identical genetic material in diverse conditions, researchers establish which traits remain stable across contexts and which are environment-dependent, informing selection decisions in breeding programs.

Breeders rely on METs to validate strain stability before commercialization and to identify superior performers for specific growing conditions. Multi-environment data informs decisions about which lines to advance, cross, or stabilize for regional adaptation.