foliar sprays are more about you than for the plant. i wouldn't spray anythign on developing buds, since i plant to ignite and inhale that plant material into my lungs. having a bunch of other random stuff in it is not my cup of tea. organic does not mean safe, LOL... plenty of organic things are incredibly poisonous or carcinogenic. it's a term that has no relevance to cause and effect of such things.
foliar sprays are a fart-sniffing activity :P bwahaha. (unless there's actually somethign wrong with your plant, i.e. just doing it as habit is not needed if providing a proper diet through the roots, which is the best way to feed the plant under healthy conditions. sometimes, with a few molecules that can fit through the stomata or absorb into the plant one way or another, which is not true of all of the nutrients nor their various variants that are plant available under normal circumstances, it can provide faster relief for a deficiency by applying a foliar spray. if fed properly, this should not be needed whatsoever. it will not provide any benefits if the plant is otherwise fed properly.