Cultivar Phenotype

Cultivar phenotype refers to the observable aromatic and physical expression of a cannabis plant within a specific genetic lineage, shaped by both heredity and growing conditions. Unlike genotype (the underlying genetic code), phenotype represents what breeders and growers actually observe—the aromatic profile, plant structure, and cannabinoid expression that emerge from seed to harvest. Different phenotypes within the same cultivar can show notable variation in terpene composition and smell, even when grown from the same genetics. Breeders working in phenotype stabilization aim to narrow this range, creating more consistent aromatic expressions across multiple generations. Understanding phenotype is essential for lineage documentation, as it helps distinguish between genetic drift, environmental influence, and true genetic variation within a strain family.

Breeders select and stabilize phenotypes by repeatedly growing out seed lines and identifying plants that consistently produce desired aromatic and structural traits. This process, often called phenotype hunting, forms the foundation of cultivar development and is critical for maintaining consistency in commercial and heirloom strain preservation.