Temperature Stress Color

Temperature stress color refers to the pigmentation changes that emerge in cannabis plants when exposed to cooler conditions, typically during late flowering or curing phases. Anthocyanins, carotenoids, and other secondary metabolites become visible when chlorophyll breaks down under thermal stress, producing purples, blues, reds, and oranges. This trait is largely genetically determined—some lineages express vivid coloration under cool conditions while others remain green regardless. Temperature stress color has no confirmed impact on potency or cannabinoid profile, though breeders and cultivators often pursue it for visual distinctiveness. Preservation requires careful documentation of growing conditions, as the same genetics may or may not express color depending on environmental management.

Breeders working with color-responsive genetics often select parent plants that consistently express anthocyanin production under controlled temperature drops. Stabilizing these traits across generations requires careful phenotype tracking and environmental consistency to distinguish true genetic color expression from environmentally induced variation.