Broadleaf Phenotype

The broadleaf phenotype refers to cannabis plants expressing wide, expansive leaf blade morphology, typically featuring larger surface area relative to narrowleaf varieties. This trait is commonly observed across indica-descended and hybrid lineages, though environmental conditions and individual plant genetics influence leaf width expression. Broadleaf phenotypes often correlate with shorter internodal spacing and more compact plant structure, characteristics frequently associated with Central Asian and Hindu Kush cannabis ancestry. The trait appears polygenically controlled, meaning multiple genes influence the degree of leaf expansion. Breeders working in this category often select broadleaf individuals when targeting specific structural or growth-rate profiles.

Breeders use broadleaf phenotype selection as a morphological marker to identify and stabilize indica-leaning genetics or to enhance dense canopy development in hybrid crosses. Leaf width observations during vegetative growth provide early phenotypic indicators helpful in parent selection and progeny screening programs.