Plant Structure Phenotype

Plant structure phenotype refers to the observable physical characteristics of cannabis plants—height, branching pattern, internode spacing, and overall architecture. These traits result from genetic expression and environmental conditions, creating variation within strain families from compact, bushy forms to tall, linear growth patterns. Breeders working in this category assess structure during cultivation to identify plants suited for specific production environments, yield potential, and cannabinoid distribution. Structure phenotypes are often categorized as indica-type (shorter, dense), sativa-type (taller, open), or hybrid expressions. Understanding structure is foundational to selective breeding, as plant architecture directly influences light penetration, canopy management, and harvest logistics across different growing systems.

Breeders intentionally select for structure phenotypes to stabilize traits in new cultivars, optimize space efficiency in controlled environments, and predict cannabinoid and terpene distribution patterns. Structure selection is critical for developing cultivars suited to specific cultivation methods—from high-density indoor cultivation to outdoor photoperiod management.