Node Spacing Internode

Node spacing, or internode length, refers to the distance between leaf nodes along a cannabis plant's main stem and branches. Compact internodes (short spacing) produce denser, more vertically-stacked growth, while elongated internodes (long spacing) create more spread-out structure with greater distance between branches. This trait is heritable and influenced by both genetics and environmental factors like light intensity and photoperiod. Breeders carefully select for internode length based on target growing environments—compact phenotypes suit indoor cultivation and space-limited settings, while longer internodes may support outdoor adaptability or specific training applications.

Internode length is a primary morphological trait used in selective breeding programs to optimize plant architecture for specific cultivation methods. Short internodes are often paired with branching structure and canopy control traits when developing compact, high-density cultivars; longer internodes are maintained in lineages developed for outdoor vigor or low-light tolerance.