CANNASIM answered grow question 6 days ago
Hey Bro, i see you are using Fox Farm, I use to use that, is important to use also Big Bloom because is organic and not too hot, there is their schedule, in the site or type in the google images. You start cutting the suggested dosage by a 3rd.
There is a product i always suggest, called Real Growers Recharge, is a combo of beneficial bacteria fungie humic vulvic ect, prevents many problems like PH and Nute locks.
To tell what the plant needs is simple, you check the leafs, if the green became weak pale, you increase the dosage, if leafs burn in the tip/ curb down you decrease.
As for the problem i see is Calcium deficiency, you can have a look on my northern lights diary to see how it evolves. That can be caused by too much of a certain mineral, ph lock or lack of it, start cutting all your nuts and using Recharge or something like it, voodoo juice(another option ect... From there you use the FF schedule in the way I suggested.
Good luck happy growing