hi do you know AZOSPIRLLIUM brasiliensis<=?. Its a bacteria, that binds the Nitrogen from the Air and the surroundings, and makes it avialable for the plant. You save 70-90 percent of Nitrogen that you ususally add. In my grows i had to give NO nutrients during vegetation at all. Its very common in asia. ( and very cheap there too)there is no overdosing or harming the Plant, Girls look nice and green and grow good.Theweedman got some great reciepes in mixing soil and supplemments( organic) , I mix my soil, and give them fluid mixture of benefical minerals like spirulina, seaweed, calcium, magnesium, sislicea and molasses ( and aloe).and for sure the Heat takes its tribute