Glandular Trichomes

Glandular trichomes are specialized epidermal structures on cannabis plants that produce and store cannabinoids, terpenes, and other secondary metabolites. These hair-like outgrowths appear predominantly on flower bracts, leaves, and stems, varying in size and stalk length depending on genetics and environmental conditions. Breeders classify cannabis strains partly by their trichome density and morphology, as these features correlate with resin production capacity. Three main types—capitate-sessile, capitate-stalked, and bulbous—are commonly documented in breeding literature, each with distinct resin-production characteristics. Understanding glandular trichome development helps cultivators and breeders optimize growing conditions and select for desired chemotype expression.

Breeders selectively work with glandular trichome phenotypes to develop lines with higher resin yields and consistent cannabinoid/terpene profiles. Trichome density and stalk morphology are heritable traits frequently tracked across generations to establish stable cultivars.