Frost Phenotype

The Frost Phenotype is a visual expression characterized by dense, crystalline trichome coverage that gives cannabis flowers a white or silvery appearance. This trait involves high concentrations of cannabinoid-rich resin glands distributed across leaves, bracts, and flowers. Breeders have selectively worked with frost-heavy genetics for decades, though trichome density is influenced by both genotype and environmental factors including light intensity, temperature fluctuation, and harvest timing. The visual intensity of frost does not directly correlate with cannabinoid potency, but consistent trichome expression is valued in breeding programs as a stability marker. This phenotype is commonly associated with certain Afghani, Hindu Kush, and hash plant lineages where resin production was historically prioritized.

Breeders working with frost phenotypes often select parent plants displaying uniform trichome coverage as a visual proxy for resin consistency across offspring. Stabilizing and enhancing frost expression requires multi-generational selection, as environmental replication across growing conditions is essential for maintaining phenotypic uniformity in seed lines.