side shoots wilting, healthy plant

I usually don't need any help, but I'm a bit confused

there's some metal issues, a bit too much n, and it could use some k...
it's not the healthiest plant I have. but why are the lower side shoots leaves shriveled

nobody knows? its spreading ive lost an entire lower branch

What type of grow is that?
How wet does it stay?
Any idea what the root temps are?

Your starting root problems and they will get worse faster.
As a side bar. You don't see any little flying bugs about do you?

Are you doing dwc?

Id check roots first. Perhaps even repotting in new soil. Never seen this before, but if its spreading, whats to lose?

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