Bract Structure

Bract structure refers to the morphology and arrangement of the leaf-like organs (bracts) that surround and protect developing cannabis flowers. Breeders and cultivators examine bract density, size, texture, and trichome coverage as observable traits that vary significantly across genetic lines. Tight, resinous bracts are often associated with certain cultivar families, while looser or more elongated bract patterns appear in others. Bract structure influences light penetration, airflow around flower clusters, and the visual appearance of dried cannabis. Understanding bract morphology is useful for identifying strain characteristics, predicting yield density, and selecting parent plants for controlled breeding programs.

Breeders select for bract structure to develop cultivars with desired flower density, resin expression, and disease resistance. Tight bract architecture is commonly prioritized in indoor breeding for compact plant structure and aesthetic appeal, while open bract patterns may improve airflow and reduce mold pressure in humid environments.