Bract Density

Bract density refers to the concentration and tightness of small leaf-like structures (bracts) that surround the flower's reproductive organs. High bract density is commonly associated with compact, visually dense flowers, while lower bract density may result in airier, more open inflorescence architecture. Bract arrangement and density are genetically influenced traits that vary significantly across cannabis lineages. This structural characteristic can affect visual appearance, trichome visibility, and drying/curing dynamics, making it relevant to both breeding selection and cultivation observation.

Breeders working in commercial and craft genetics often select for consistent bract density as a stabilizing trait within stable lines. Dense bract phenotypes are frequently paired with other desirable characteristics during line-stabilization work, though bract tightness alone does not determine cannabinoid or terpene content.