Gland Density

Gland density refers to the concentration and distribution of trichomes—crystalline resin structures—across a cannabis plant's surface, particularly on flowers and leaves. High gland density is often associated with strains bred for resin production, while lower density may occur in plants selected for other traits. Trichome concentration varies by cultivar, environmental conditions, and genetics, with some lineages consistently producing dense, frosted-appearing flower sites. Breeders evaluating gland density typically examine trichome head diameter, stalk length, and overall coverage patterns as selection criteria. This trait intersects with cannabinoid and terpene production pathways, though trichome presence alone does not determine chemical composition.

Cultivators and breeders use gland density as a visual phenotype marker during selection, as it can correlate with resin-producing capacity in target lineages. High-density trichome expression is often prioritized in breeding programs working to establish consistent hash-plant or concentrate-oriented genetics.