Plant Structure Internode Length

Internode length refers to the distance between successive nodes (leaf attachment points) along a cannabis stem. Shorter internodes create a more compact, bushy plant architecture, while longer internodes produce taller, more spread-out plants with fewer branch sites per unit height. Internode length is a heritable trait influenced by both genetics and environmental factors such as light intensity and photoperiod. In breeding programs, selecting for internode characteristics affects yield potential, canopy structure, and cultivation efficiency. Breeders often target specific internode lengths to optimize for indoor versus outdoor growing conditions or to achieve desired plant profiles within space constraints.

Breeders prioritize internode length as a structural selection criterion to develop cultivars suited to particular growing environments and techniques (SOG, SCROG, outdoor). Shorter-internode genotypes reduce vertical stretch and improve light penetration to lower canopy layers, while longer-internode lines may concentrate growth at apical sites.