Structural Phenotypes

Structural phenotypes in cannabis refer to observable plant architecture traits shaped by genetics and environment—including height, branching patterns, internode spacing, and leaf morphology. Breeders document these characteristics as they directly influence cultivation requirements, yield distribution, and compatibility with different growing systems. Structural phenotypes are inherited traits that remain relatively consistent across generations of a given line, making them valuable markers for strain identification and breeding selection. Common classifications include indica-type compact plants, sativa-type tall plants, and hybrid architectures that blend both patterns. Understanding structural phenotypes helps cultivators predict plant behavior and assists breeders in selecting parents for desired growth habits.

Breeders actively select for specific structural phenotypes to develop strains suited to particular environments—compact plants for limited space or control, and taller plants for outdoor cultivation or vertical spacing. Structural consistency within a line is a key indicator of genetic stability and homozygosity.