Plant Height Dominance

Plant height dominance refers to genetic traits that consistently produce taller or more vertically-oriented growth patterns across generations. Cannabis cultivars exhibiting height dominance often derive from sativa-forward lineages or specific parent selections favored in breeding programs. Height expression is polygenic—controlled by multiple genes—and heavily influenced by environmental factors including light duration, nutrient availability, and growing space. Breeders working in this category often track height ratios across F1 and F2 generations to stabilize desired stature for indoor cultivation constraints or outdoor canopy management. Understanding height dominance is critical for seed producers selecting parents, as it directly impacts cultivation feasibility and resource requirements.

Breeders prioritize height dominance mapping when developing cultivars for specific growing environments. Crossing height-recessive (compact) lines with height-dominant strains allows targeted selection of intermediate phenotypes suited to commercial production standards.