Internode Density

Internode density refers to the spacing between leaf nodes along a cannabis stem, a structural trait influenced by genetics and environmental conditions. Plants with tight internodes display nodes positioned closely together, while loose internodes create greater vertical spacing between branch points. This characteristic affects canopy structure, light penetration, and overall plant architecture. Breeders working in indoor cultivation often select for tighter internode spacing to maximize space efficiency, while outdoor cultivators may favor varied spacing depending on climate and growing strategy. Internode density is a polygenic trait, meaning multiple genes contribute to its expression, making it an important consideration in stabilizing cultivar morphology across generations.

Breeders use internode density as a selection criterion to develop cultivars suited to specific growing environments. Compact internodal spacing is commonly associated with space-efficient phenotypes valued in controlled indoor settings, while looser spacing may support airflow and resilience in outdoor or high-humidity environments.