Anthocyanin Phenotypes

Anthocyanin phenotypes refer to cannabis plants expressing visible purple, blue, or red pigmentation in leaves, bracts, and flowers—traits linked to anthocyanin accumulation rather than chlorophyll. These pigments are water-soluble flavonoids common across plants and are triggered by genetics, cold temperatures, and UV exposure during flowering. Anthocyanin expression does not inherently affect cannabinoid or terpene profiles, though certain lineages selected for color stability have been crossed repeatedly. Breeders distinguish between true genetic anthocyanin dominance and environmentally induced coloration. Notable parent lines often include Purple Urkle, Granddaddy Purple, and various Afghani-derived cultivars historically selected in cooler climates.

Breeders working with anthocyanin phenotypes select for color intensity and stability across generations, often combining purple-dominant lines to establish reliable expression. This trait is tracked as a visible marker in breeding programs but remains independent from cannabinoid potency or terpene composition.