Plant Height Dominance

Plant height dominance refers to genetic traits that predispose cannabis cultivars toward taller vegetative structures, often linked to internode spacing and stem elongation patterns. This characteristic is frequently observed in sativa-influenced lineages and certain hybrid crosses where vertical growth is more pronounced than in compact, indica-type plants. Height expression varies considerably based on environmental factors including light spectrum, photoperiod, and growing space, making phenotypic assessment context-dependent. Breeders working with this trait must account for both genetic predisposition and cultivation conditions when selecting parent plants. Understanding height dominance is relevant for commercial growers optimizing canopy management and for breeders developing cultivars suited to specific growing systems.

Height dominance traits are valuable selection markers for breeders developing cultivars adapted to outdoor or high-ceiling greenhouse environments. Conversely, breeders targeting compact, high-density indoor cultivation often actively select against height dominance in favor of shorter, bushier phenotypes.