Pigmentation

Pigmentation in cannabis refers to the expression of anthocyanins, carotenoids, and chlorophyll—compounds responsible for visible coloration in flowers, leaves, and bracts. While often aesthetically striking, pigmentation is primarily a genetic trait influenced by temperature, pH, and light exposure during flowering. Breeders recognize pigmentation patterns as markers of underlying genetic heritage rather than as indicators of cannabinoid or terpene content. Purple, red, and deep orange hues are commonly associated with specific strain lineages, particularly those derived from Hindu Kush or Afghan landraces. Pigmentation documentation helps preserve genetic identity across seed generations, though color expression remains inconsistent without strict environmental controls.

Breeders working in heirloom preservation programs often use pigmentation as a visual marker for phenotypic selection and lineage authentication. Consistent pigmentation expression across generations can indicate genetic stability and is valued in breeding for true-to-type seed lines.