Leaf Color Genetics

Leaf color in cannabis is governed by multiple genetic pathways involving chlorophyll production, anthocyanin expression, and carotenoid accumulation. Breeders recognize several phenotypic categories: standard green foliage (most common), purple/burgundy variants (linked to anthocyanin genes), and chlorophyll-deficient forms producing yellowed or variegated leaves. These traits are often polygenic, meaning multiple genes contribute to final coloration, and environmental factors—particularly temperature and light exposure—significantly influence expression. Leaf color genetics has historically served as a visual marker for lineage identification and selective breeding programs, though it remains largely independent of cannabinoid or terpene profiles. Understanding these genetic mechanisms helps breeders maintain trait stability across generations and distinguish cultivars in breeding docu

Breeders working with leaf color focus on stability across generations and documentation purposes. Colored leaf phenotypes are sometimes selected for market differentiation, though color genes are tracked separately from agronomic and potency traits in serious breeding work.