Dense Trichomes

Dense trichomes refer to a high concentration of resinous glandular structures covering the cannabis plant's surface, particularly on flowers and leaves. These microscopic structures—primarily capitate-stalked and capitate-sessile trichomes—produce and accumulate cannabinoids, terpenes, and flavonoids. Plants classified as having dense trichomes typically display heavy crystalline coverage visible to the naked eye, a trait often correlated with selective breeding for potency and resin production. Trichome density varies significantly across cultivars and is influenced by genetics, growing conditions, and harvest timing. Breeders evaluating trichome expression use visual assessment and microscopy to identify parent plants expressing this trait consistently.

Breeders pursuing high-resin phenotypes prioritize dense trichome expression as a marker for cannabinoid and terpene accumulation potential. Dense trichome traits are often stabilized through multi-generational selection, making this characteristic a standard breeding target in modern cultivar development.