Leaf Shape Broad Leaflet

Broad leaflet morphology refers to cannabis plants displaying wider, more spatulate leaf blades relative to petiole length—a trait often associated with indica-type genetics or indica-dominant crosses. This phenotype appears across multiple unrelated lineages and is influenced by both genetic background and environmental conditions during vegetative growth. Breeders working in this category have historically linked broad leaflets to shorter flowering times and denser canopy structures, though leaf shape alone is not a reliable indicator of cannabinoid profile or growth characteristics. The trait's heritability varies considerably depending on parental genetics and specific growing conditions. Understanding broad leaflet expression helps breeders document plant architecture and predict structural tendencies across generations.

Breeders select for or against broad leaflet traits when working toward specific plant architecture goals, as the morphology can influence light penetration, airflow, and canopy density. Documenting this trait in breeding records supports phenotype cataloging and helps predict structural characteristics in F1 and subsequent generations.