Plant Height And Stretch

Plant height and stretch describes the vertical growth patterns of cannabis cultivars, ranging from compact dwarfs to tall, vigorous phenotypes. Stretch typically refers to rapid vertical elongation during flowering transition, when plants respond to photoperiod shifts. These traits are polygenically controlled and heavily influenced by environmental factors including light intensity, spectrum, temperature, and humidity. Breeders distinguish between genetic predisposition to height and phenotypic expression in specific conditions. Understanding stretch behavior is essential for cultivation planning, as tall plants require different management than compact varieties. Height classifications help growers select appropriate genetics for their growing space and environmental constraints.

Cannabis breeders actively select for height traits to suit commercial and home cultivation environments. Compact, low-stretch genetics are prioritized for space-limited indoor setups, while taller phenotypes may be retained for outdoor production or breeding programs valuing vigor and biomass.