Pigmentation

Pigmentation in cannabis refers to the visible coloration of plant tissues—leaves, bracts, and sometimes flowers—ranging from deep purples and blues to reds and blacks. These colors result from anthocyanin and other flavonoid compounds, which are distinct from chlorophyll and typically express under specific environmental conditions, particularly cooler temperatures during flowering. Pigmentation is a heritable trait influenced by both genetics and growing conditions, making it a marker breeders track in pedigree records. While pigmentation itself is a structural/chemical feature rather than an aroma compound, it often correlates with particular terpene profiles in certain lineages. Understanding pigmentation patterns helps breeders select for genetic stability and recognize strain families with consistent phenotypic expression.

Breeders use visible pigmentation as a rapid phenotypic marker when selecting parent plants, since colored cultivars often breed true across generations. Pigmentation stability is particularly valuable in stabilized lines, helping breeders confirm genetic consistency without waiting for full cannabinoid or terpene analysis.