Plant Pigmentation

Plant pigmentation in cannabis refers to the visible coloration of flowers, leaves, and stems—including anthocyanins (purples, blues, reds), carotenoids (yellows, oranges), and chlorophyll (greens). These pigments are influenced by genetics, temperature, light exposure, and nutrient availability during cultivation. Pigmentation is often associated with specific cannabinoid and terpene profiles, though color alone is not a reliable indicator of potency or chemical composition. Breeders have selectively worked with pigmentation traits to develop cultivars with distinctive visual characteristics, particularly in the purple and red phenotype categories. Understanding pigmentation genetics helps cultivators optimize growing conditions and assists breeders in stabilizing desirable visual traits across generations.

Breeders use pigmentation as a phenotypic marker and selection criterion, particularly when establishing stable lines with consistent visual expression. Pigment expression can correlate with environmental stress responses and secondary metabolite production, making it a useful trait to monitor during controlled breeding programs.