About day 25 in flower I noticed about 25% of my top fan leaves were slightly less green than the rest so I upped the nitrogen but its now day 30 and theres no difference,no spots or anything,just a lighter shade of green.I'm thinking it could be iron deficiency but as I look @ you tube vids I notice the same in many of them toward the later stages of flowering.My question is,wether or not I have a nutrient deficiency now,is there a point in flowering where you will start to get discolored leaves etc. naturally and just quit worrying about nutrient deficiencies altogether?