Fan leaves are turning yellow

[Scrappy66]

Hey everyone, I’m currently growing 3 autos. 5 weeks into the grow I’m having some issues with al three plants. I’m currently feeding them flora nuits. We up’d the nutrients amount a week ago and now The bottom fan leaves are dying off. Is this normal during the budding stage, is the plant in nuit lock or is it a deficiency. I have attached a few pictures. Thanks so much

 

[Newbill10]

They look pretty good. You have enough nitrogen. I would do a flush, check ph water in and out. Then go to week seven feeding schedule.

 

[Sancheh]

No issues that need addressing