Sex Reversal

Sex reversal refers to horticultural techniques used to induce female cannabis plants to produce viable pollen, creating feminized seed stock or all-female breeding lines. Common approaches involve chemical treatment (silver thiosulfate, colloidal silver) or stress-induced methods that trigger hermaphroditic expression in genetically female plants. This practice emerged in the 1990s as a cornerstone of modern seed breeding, enabling breeders to reliably produce feminized seeds without male plants. Sex reversal is distinct from natural hermaphroditism or male trait selection, and represents an intentional breeding intervention documented across professional seed development. Understanding sex reversal mechanics is essential for evaluating seed stability, breeding lineage transparency, and plant structure predictability in modern cultivar development.

Breeders employ sex reversal to create feminized seed lines, accelerate trait stabilization, and reduce cultivation space required for breeding programs. This technique allows controlled crossing of two female plants, making it foundational to most contemporary feminized seed development and hybrid stabilization workflows.