Trichome Density Selection

Trichome density selection refers to breeding practices targeting the abundance and distribution of resinous glandular structures across cannabis plant surfaces. Breeders working in this category prioritize visible crystal coverage—a trait linked to secondary metabolite accumulation including cannabinoids and terpenes. Dense trichome development is commonly assessed during phenotype evaluation as a visual marker of desirable genetic expression. This trait varies significantly across cultivar families, with some lineages naturally expressing higher trichome counts than others. Selection for trichome density represents a foundational breeding goal across modern cannabis genetics, though density alone does not determine cannabinoid or terpene composition.

Breeders use trichome density as a visual selection criterion during plant evaluation and parent selection. High-density phenotypes within a cross are often retained for subsequent generations to concentrate this trait, making it a practical marker in multi-generation breeding programs.