Royal AK photoperiod

Flower Week 4 Day 64 - Girls got a full strength feed today of 1.5l each Day 65 - Nothing today. The dying leaves are still dying but the rest of the girls look ok and appear to be doing well so I will just continue and see what happens Day 66 - The girls got a 1.5l full feed today but not sure that they needed it? Just wondering if they are lacking in food hence the yellow leaves. I will continue to monitor them as other than some leaves turning yellow the girls in my eyes look to be ok and flowering nicely? Day 67 - Nothing today Day 68 - Nothing today as I want to make sure the girls have dried out a little Day 69 - Girls got a 1.5l full feed today. Still some yellowing leaves/dying leaves but again it's on the lower part of the plants and up top looks ok? Also it isn’t spreading or doesn’t appear to be getting worse so fingers crossed it’s just from a previous mistake that I have now fixed? Day 70 - End of week 4. Girls measure in at; No.1 is 87cm, No.2 is 74cm and No.3 is 60cm I think all is going ok, could be better but good also be worse. I have no idea what is happening at times with the changing colour of the leaves but overall I think the girls are doing ok and the rest I will learn as I go. Hope everyone is well and thanks for dropping by :)