Most people that ive seen using foxfarms products usally have some probs dialing in thier nute schedule but once you do they perform really well. From what ive seen most people in general will tell you dont feed them until sex then start off at 1/4 to a half strength. Reason being autos are sensitive to everything because their life cycle is on auto pilot better to deprive them a little then you can feed rather than burn them and not be able to help them at all. By the time you can see with your eye if they are hungry, wilted leaves, discoloration,etc, you can then feed before they die and they will recover, burned plants recover but the damage isnt.Hope this helps you.