Internodal Length

Internodal length refers to the distance between successive nodes (branch points) along a cannabis stem. Plants exhibiting short internodes develop a compact, bushy structure with closely-spaced branches, while long internodes produce tall, sparse plants with greater vertical spacing. This trait is controlled by multiple genetic factors and environmental conditions including light spectrum, photoperiod, and temperature. Internodal length significantly influences plant architecture, canopy density, and cultivation efficiency. Breeders have selected for both phenotypes depending on target growing conditions: short internodes suit dense indoor canopies and limited vertical space, while longer internodes may optimize light penetration in certain outdoor or greenhouse systems.

Breeders frequently cross for internodal length to develop cultivars suited to specific production environments. Selection for compact growth reduces overall plant height while maintaining yield potential, making it a key trait in modern indoor breeding programs.