Plant Structure Open

Open plant structure refers to cannabis phenotypes characterized by loose, airy branching and internodal spacing that allows light penetration throughout the canopy. Plants exhibiting this trait typically develop fewer, longer branches with greater distance between nodes, contrasting with dense, compact forms. This architecture is frequently observed in sativa-dominant lineages and equatorial landraces adapted to high-humidity environments. Open structure can influence cultivation considerations around airflow, pest management, and light distribution. Breeders working in this category often select for this trait when targeting environments requiring improved ventilation or when crossing to influence overall plant morphology.

Cultivators and breeders select for open structure to manage mold pressure, improve canopy penetration, and facilitate harvesting efficiency. This trait is commonly crossed into lines to counterbalance dense phenotypes or to adapt genetics to specific growing conditions.