Node Density

Node density refers to the spacing and concentration of growth nodes along a cannabis plant's stem — the points where branches, leaves, and flowering sites emerge. Plants with tight node spacing (close internodal distance) develop more potential flowering sites per unit of stem length, while loose node spacing creates longer gaps between branching points. Node density is a structural trait influenced by genetics, environmental conditions like light intensity and photoperiod, and plant age. Breeders working in cultivation-focused genetics often select for desirable node patterns to optimize canopy architecture, light penetration, and yield potential under specific growing systems.

Breeders prioritize node density when developing cultivars for different grow environments — tight nodes suit indoor SOG (sea of green) and vertical systems, while loose nodes may suit outdoor or high-light conditions. Node density also affects plant height management, training response, and how efficiently branches fill a canopy.