Bract Coverage

Bract coverage refers to the density and distribution of bracts—specialized leaf-like structures—that surround and protect developing cannabis flowers. Breeders assess bract coverage as a structural trait affecting flower appearance, resin gland presentation, and overall trichome visibility. Heavy bract coverage typically results in denser, more compact flowers, while lighter coverage may expose more of the underlying floral tissue. This characteristic varies significantly across strain families and is often influenced by genetic background and phenotypic expression. Understanding bract coverage helps breeders predict structural outcomes and select parent plants for consistent flower morphology.

Breeders selectively breed for specific bract coverage levels to achieve desired flower density, trichome exposure, and visual consistency in commercial or preservation lines. Bract density also influences drying behavior and storage characteristics, making it a practical consideration in breeding for stability.