Plant Structure Classification

Plant structure classification refers to the morphological characteristics and growth patterns that distinguish cannabis phenotypes, including height, branching architecture, internode spacing, and leaf shape. Breeders categorize plants along spectrums—from compact, bushy types to tall, stretch-prone varieties—based on genetic lineage and environmental response. These classifications emerged from formal breeding documentation and regional cultivation traditions, with some traits linked to ancestral geography (equatorial vs. temperate). Understanding structure is foundational to breeding programs, as it influences yield potential, canopy management, and cultivation suitability. Structure interacts with flowering time, nutrient demand, and pest resilience, making it a core selection criterion alongside cannabinoid and terpene profiles.

Breeders actively select for structure to develop cultivars suited to specific growing environments and commercial systems—compact plants for controlled environments or dense canopies, taller phenotypes for outdoor or high-ceiling facilities. Consistent structure classification helps maintain stability across generations and enables predictable crop planning.