In Cannabis, auxins and ethylene have feminizing eects (Heslop-Harrison, 1956; Mohan Ram and Jaiswal, 1970) whereas cytokinins and gibberellins have masculinizing eects (Atal, 1959; Chailakhan, 1979). "
http://www.researchgate.net/publication/229837627_Auxin_and_Sexuality_in_Cannabis_sativa