Cultivar Phenotype

Cultivar phenotype refers to the observable physical and chemical characteristics expressed by a cannabis plant within specific environmental conditions, distinct from its underlying genetic blueprint (genotype). Breeders and growers recognize that identical genetics can produce notably different plant structures, terpene profiles, and cannabinoid ratios depending on cultivation variables like light, temperature, humidity, and soil composition. Phenotype hunting—selecting and stabilizing desirable phenotypes across multiple generations—remains a foundational breeding practice in cannabis genetics development. Understanding phenotypic expression helps breeders identify which plants merit seed production or clonal preservation. Documentation of phenotypic traits across grow environments provides essential data for lineage records and breeding program transparency.

Phenotype selection drives cultivar stabilization and improvement. Breeders isolate high-performing phenotypes from seed runs, then establish these as mother plants or release them as named cultivars, creating the foundation for consistent breeding lines and commercial varieties.