Leaf Color Morphology

Leaf color morphology refers to the genetic expression of pigmentation in cannabis foliage, encompassing chlorophyll-dominant greens, anthocyanin-driven purples and blacks, and carotenoid-influenced yellows and oranges. These colorations are polygenic traits influenced by temperature, light spectrum, nutrient availability, and underlying genetic markers. Breeders working in this category often select for stable color expression across growing conditions, as leaf pigmentation can signal plant health, maturity stage, and genetic stability. Color morphologies are frequently documented in strain genealogies and seed catalogs as identifying characteristics, though they do not directly correlate with cannabinoid or terpene profiles.

Breeders use leaf color as a phenotypic marker for line stabilization and cultivar identification. Consistent color expression across generations helps establish visual brand identity and can indicate robust genetics under environmental stress.