Leaf Color Phenotypes

Leaf color phenotypes describe the visible pigmentation variations in cannabis plant foliage, ranging from standard green to purple, red, and yellow expressions. These colors result from the presence or absence of chlorophyll, carotenoids, and anthocyanin compounds—pigments influenced by genetics, temperature, light exposure, and nutrient availability. Breeders recognize leaf color as a marker trait often linked to specific genetic lineages, though the trait itself is polygenic and environmentally responsive. Documenting leaf color phenotypes helps establish visual identification standards within breeding programs and aids in tracking genetic stability across generations. Color shifts during flowering or senescence are commonly observed and recorded as part of strain characterization.

Breeders working in specialized genetics programs select for consistent leaf color expression as a secondary trait marker for phenotype stability and line identification. Leaf color phenotypes are often correlated with terpene profiles and plant structure in certain lineages, making them useful reference points during pheno-hunting and selection cycles.