What deficiency is this?

There you go. That’ll fix it.
I just uppotted a 5 foot bush the other day, but I’m pretty strong for an old fart😁.

I’d say it depends where you live. We don’t have russet or broad mite problems in the Northeast. At least I haven’t seen them in 32 years of outdoor and some indoor growing, and these last 4 years outdoor/ indoor growing, like you are doing.
The problem with bugs here arises in the fall, when my plants have to stay inside permanently, after doing the indoor outdoor thing during summer. Then I’ll have issues with aphids or mites, or both, all winter and spring.
Broad/ Russet mites are a mofo out west. Little friggin terminator bugs. Ive dealt with russet mites and you DO NOT want them. I fought those off for 3 or 4 weeks before exhaustion wore me out.
If you live out there, you better follow @Wizzlez good advice,( and super cool photo) but if you are in a wetter area East of the Mississippi, as long as you continue the in/ out thing, I think you’ll be fine. The predators outdoors will pick off any bugs for you. I often have ladybugs hitch a ride in for the night. Any plant mite has a real tough time outside in the Northeast, and in 32 years outdoors, I never had an issue. Never even had one leaf damaged by them. So it’s a location thing.
You’ll have to clean your tent before your next indoor run or anything you’ve brought in could become an infestation.

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