Im growing purple desiel and purple AK 47 outdoors. September 25th is the predicted date when the amount of sun is 12/12 almost exactly (off by four minutes). My question is, will they start to flower on that day or is it more than that that determines when they start to flower. If its more than that, is like to know what if you know. The reason I'm asking is because I need to figure out when to give it the bloom boosters.