Carotenoid Pigmentation

Carotenoid pigmentation refers to the yellow, orange, and red hues produced by carotenoid compounds in cannabis plant tissues, particularly in flowers, leaves, and occasionally trichomes. These pigments are secondary metabolites that accumulate during late flowering and can be influenced by genetic background, light exposure, temperature, and nutrient availability. Carotenoids are distinct from anthocyanins (which produce purples and blues) and chlorophyll (green). Lineage records frequently report carotenoid expression as a visual trait in both indica and sativa families, though prevalence varies widely by genetic line. Breeders working in this category often select for stable, heritable carotenoid phenotypes to establish consistent aesthetic signatures within cultivars.

Carotenoid expression is used as a visual marker in selective breeding programs to distinguish cultivar phenotypes and track genetic stability across generations. While aesthetically distinctive, carotenoid traits are typically polygenic and environmentally responsive, requiring consistent growing conditions and multi-generation selection to stabilize within a breeding line.