Bract Density

Bract density refers to the concentration and arrangement of small, leaf-like structures (bracts) that surround the cannabis flower's reproductive organs. High bract density typically correlates with tightly packed flower structures, while low bract density produces more open, airy formations. This trait is influenced by both genetics and environmental conditions, including light intensity, temperature, and humidity during flowering. Bract density affects visual appearance, trichome accessibility, and the ratio of floral material to leaf matter in dried product. Lineage records frequently report that certain cultivars within specific strain families consistently express either dense or loose bract patterns across generations.

Breeders select for bract density to stabilize desired flower structure phenotypes, manage processing efficiency, and influence the aesthetic and physical characteristics of finished material. Dense-bracted cultivars may require different handling protocols than loose-bracted varieties, making this trait relevant for cultivation and production standardization.