Canopy Density

Canopy density refers to the thickness and compactness of a cannabis plant's foliar arrangement—how closely leaves and lateral branches pack the growing envelope. Dense canopies feature tight nodal spacing and overlapping foliage that limits light penetration to lower growth, while open canopies allow more airflow and light distribution through the plant structure. Breeders and cultivators assess canopy density as a key trait affecting light management, humidity control, and harvesting efficiency. Dense phenotypes often require more active pruning and airflow to prevent mold pressure in humid environments, whereas open structures naturally favor ventilation. Canopy density is influenced by both genetic background and vegetative management techniques.

Breeders select for canopy density based on cultivation environment and operational goals. Dense phenotypes suit controlled indoor setups with active climate management, while open structures are often favored for outdoor or greenhouse production where natural airflow is relied upon.