Indoor wondering about yellowing

its really hard to give a diagnosis remotely and even harder without pics. I guess they are big and you say yellowing and general weakness (i.e. no spotting etc.) and week 7 I would have already been on full strength nutes - so it could be just under nuted.. flush if all else fails, clean slate and all.

what is the NPK of the nutes you are giving her, and are there any micro nutes in them?

FF Tiger bloom....2-8-4 I think
 
Most likely a P deficiency as they are pretty common in mid to late flowering. Weakness of the branches can also be a sign. Even if your pH is good going in, your run off could be too high or low. So unless you capture and check some run off, we'll never know for sure. If it is a lockout situation, then feeding more won't help.
 
Runoff ph is 6.4....going in at 6.7.....a little low but it shouldnt be locked out right? Im gonna feed once again with the full 3 tsp/gal of water tomorrow aslo if they are dry. It bounced back pretty quick after the last feeding. I think I was so paranoid about over feeding and nute burn I was too cautious and they plants are angry at me and telling me they are starving lol.
 
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