Plant Structure High Internode Spacing

High internode spacing refers to greater distances between leaf nodes along the main stem and branches of a cannabis plant. Plants exhibiting this trait typically develop a more open, airy canopy structure with fewer leaves per unit length of stem. This characteristic is often observed in sativa-dominant genetics and landraces from equatorial or tropical regions, where longer photoperiods historically favored vertical growth patterns. Breeders frequently encounter this trait when working with heritage cultivars or when selecting for height and stem elongation. High internode spacing can influence canopy management, light penetration, and the spatial arrangement of flower sites during the reproductive phase.

Breeders working with high internode spacing genetics may prioritize this trait for vertical growing environments, greenhouse cultivation, or when targeting specific canopy architectures. Selection pressure toward compact internodes (the inverse trait) is common in indoor breeding programs seeking denser, more manageable plant profiles.