Temperature Induced Coloration

Temperature-induced coloration refers to anthocyanin and carotenoid pigment expression triggered by cooler growing conditions, particularly during the flowering or late vegetative stage. These water-soluble and lipid-soluble compounds create purple, red, blue, and orange hues in leaves, bracts, and sometimes pistils. Genetic predisposition determines a plant's capacity for pigment production, while environmental factors—especially night temperatures below 55°F (13°C)—activate visible color shifts. This trait is independent of cannabinoid or terpene profiles, though certain lineages are more responsive to temperature stress. Breeders and cultivators monitor this phenotype to understand genotype expression and growing condition impacts.

Breeders select for temperature-responsive genetics to develop stable, visually distinctive cultivars and to study how environmental triggers interact with plant physiology. Understanding coloration potential helps predict phenotypic variability across different cultivation environments and seasons.