You are a little short of N at this point in the cycle. You are not feeding them enough nutrients and in the improper portions for the cycle. You need to tweak the nutrients every few weeks to keep up with the growth cycle

Try some fish shit by its self then go back to mixing a good flower formula. You should be watering every 3-4 day's at least. I hope you have proper drainage to water like that too.
Zandor Reviewed by Zandor on . Question :) When flowering would leaf tips curl under due to over feeding or is it more likely due to under feeding? Rating: 5