Cannabis Morphology

Cannabis morphology refers to the observable physical structure and form of cannabis plants, encompassing traits such as plant height, branching pattern, leaf shape, and internode spacing. Breeders and botanists classify plants along a spectrum from compact, dense phenotypes to tall, open-structured forms, with most cultivated varieties falling somewhere between these extremes. Morphological traits are influenced by both genetics and environmental factors including light, temperature, and nutrient availability. Understanding morphology is foundational to breeding programs, as plant structure directly affects cultivation efficiency, canopy management, and yield potential in controlled environments. Historical cannabis breeding has selected for specific morphologies suited to indoor cultivation, outdoor climates, and extraction methods.

Breeders strategically combine morphological traits to create plants adapted to target cultivation systems—compact indicas for high-density indoor farming, or taller sativas for outdoor equatorial growing. Morphological stability across generations is a key selection criterion when stabilizing new cultivars and creating F1 hybrids with predictable structure.