Extended Veg

Extended Veg refers to cannabis plants that exhibit prolonged vegetative growth phases before flowering, even under photoperiods typically associated with bloom initiation. This trait is commonly observed in landrace and heirloom genetics, particularly those originating from equatorial regions where day-length variation is minimal. Breeders working in this category have noted the characteristic slow transition to reproductive stages, which can extend the overall cultivation timeline significantly. The genetic basis appears polygenic, influenced by phytochrome sensitivity and circadian rhythm regulation. Extended Veg genetics remain relevant in breeding programs seeking vigorous rooting systems, large frame development, or extended terpene accumulation during the vegetative phase.

Breeders intentionally select for or breed away from extended veg traits depending on cultivation targets—longer veg cycles support development of robust root architecture and canopy mass in indoor environments, while fast-flowering crosses often require culling extended veg phenotypes. Understanding this trait's heritability helps predict photoperiod stability and flowering reliability in hybrid