Gibberellic Acid Application

Gibberellic acid (GA₃) is a plant hormone used in cannabis cultivation to influence plant growth patterns and flowering timing. Breeders and cultivators apply gibberellic acid exogenously to modify stem elongation, seed production, and phenotypic expression in controlled environments. Application methods vary, including foliar sprays and root-zone treatments, though timing and concentration significantly affect outcomes. This technique is particularly relevant in breeding programs seeking to stabilize traits, increase seed yield from feminized lines, or study genotype-environment interactions. Gibberellic acid does not alter cannabinoid profiles but may influence morphological characteristics used in phenotype selection.

Breeders employ gibberellic acid to reverse female plants and produce male gametes for hybridization work, enabling controlled crosses without maintaining separate male stock. The hormone also assists in identifying environmentally plastic traits versus genetically fixed ones, refining selection criteria across breeding generations.