Well my first opinion is you are about to the end of the grow. Showing signs of root bound, a tiny N deficiency (don't freak, I consider it normal at this point), maybe a little. lockout.

Fill out the trouble shooting form for sure, but, I suggest you just start the flush, expect will be done in 2 weeks or less. Looks pretty yummy. No more nutes at all.
WashougalWonder Reviewed by WashougalWonder on . Help PLEASE!!! NUG starting to look funny! Could you guys peep this for me. I am new to the indoor game and noticed my top nug has a brown spot starting or is it turning purp? It is a Grand Daddy Purple at bout 6 weeks of flower. Just want to catch a problem early if there is one. THANKS VERY MUCH. OH forgot leaves have been turning yellow with brown spots and dying the last few days at very rapid rate! Rating: 5