Plant Structure Internode Spacing Long

Long internode spacing refers to cannabis plants with notably extended distances between leaf nodes along the main stem and branches. This structural trait is often associated with sativa-dominant or tropical lineages, where vertical growth and light-seeking behavior were advantageous in dense forest canopies. Breeders working with long-internode genetics may observe taller plants with fewer leaves per unit height, which can affect canopy management, light penetration, and training requirements in cultivation. The trait is generally considered a morphological marker rather than a quality or potency indicator, and its expression can be modified by environmental factors including light spectrum, photoperiod, and nutrient availability.

Long internode spacing is selectively maintained or minimized depending on cultivation goals—some breeders prioritize it for vertical-growth phenotypes suited to SOG or height-restricted environments, while others select away from it to maximize canopy density. Understanding this trait's heritability helps breeders predict plant architecture across generations and make informed crosses for specifi