Carotenoid Pigmentation

Carotenoid pigmentation refers to the yellow, orange, and red hues in cannabis plants, produced by carotenoid compounds that operate alongside chlorophyll during photosynthesis. These pigments are most visible in late-stage flowering and curing, when chlorophyll breaks down and carotenoids become dominant. Carotenoid expression is influenced by genetics, temperature stress, light exposure, and nutrient availability—particularly phosphorus and potassium. Breeders document carotenoid intensity as a phenotypic marker in strain documentation, though pigmentation alone does not indicate cannabinoid or terpene profile. Understanding carotenoid genetics helps breeders select for consistent visual traits across generations.

Breeders track carotenoid expression as a stable visual phenotype useful for strain differentiation and consistency verification in seed lines. Carotenoid intensity under controlled conditions can serve as a quick visual checkpoint during phenotype hunting, though it requires standardized growing parameters to remain reliable across batches.