Frost Coverage

Frost coverage refers to the dense accumulation of trichomes—crystalline resin glands—across cannabis flower surfaces, creating a white or silvery crystalline appearance. This visual characteristic develops as plants mature, with trichome density influenced by genetics, environmental stress, light intensity, and nutrient availability. Breeders often associate high trichome coverage with certain chemotypes and cannabinoid profiles, though trichome density alone does not determine potency or cannabinoid concentration. The term "frosty" has become common in breeding documentation to describe phenotypes exhibiting pronounced trichome development. Understanding frost coverage helps cultivators and breeders assess plant maturity, genetic expression, and potential harvest readiness.

Breeders working toward high-resin cultivars frequently select for frost coverage as a visual marker of trichome production capacity. Dense trichome expression is often paired with specific terpenoid profiles and cannabinoid ratios during phenotype hunting and line stabilization.