Auxins

Auxins are a class of plant hormones that regulate growth, development, and stress responses in cannabis and other plants. In cannabis breeding and cultivation, auxins influence stem elongation, root development, apical dominance, and flowering timing. These naturally-occurring compounds are commonly discussed in horticultural contexts when examining plant architecture, branching patterns, and response to environmental stressors. Breeders and growers monitor auxin-influenced traits—such as internode spacing and root vigor—as indirect markers of plant vigor and structure. Understanding auxin activity helps explain why cannabis plants develop different phenotypic expressions under varying light, nutrient, and physical stress conditions.

Cannabis breeders indirectly select for auxin-responsive traits when stabilizing plant architecture, flowering consistency, and stress tolerance across generations. Cultivation techniques that manipulate light angle, grow media, and mechanical stress are understood to modulate auxin distribution, making auxin physiology relevant to phenotype expression and strain stability work.