Cannabis related studies (more to be added later):
ABA (Abscisic acid)
- Using ABA as foliar generally isn't wise because it can reduce stomatal conductance quite a bit (make stoma close down).
"Effects of ABA on primary terpenoids and D9-tetrahydrocannabinol in Cannabis sativa L. at ﬂowering stage"
Hakimeh Mansouri, Zahra Asrar and Jan Szopa
Plant Growth Regulators (2009) vol. 58, pp. 269–277
GA3 (gibberellic acid)
- Using GA3 can make plants stretch A LOT; I do not suggest it's use for general growing
"The response of terpenoids to exogenous gibberellic acid in Cannabis sativa L. at vegetative stage"
Hakimeh Mansouri, Zahra Asrar and Ryszard Amarowicz
Acta Physiol Plant (2010)
"Effects of Gibberellic Acid on Primary Terpenoids and D9-Tetrahydrocannabinol in Cannabis sativa at Flowering Stage
Hakimeh Mansouri, Zahra Asrar1 and Mitra Mehrabani
Journal of Integrative Plant Biology 2009, vol. 51, no. 6, pp. 553–561