truss-rod adjustment questions

I was lowering the action on my EBMM JP7, and I tightened the truss rod to get less bow in the neck.
I applied about two quarter turns (re-checking after the first quarter turn) and I liked the neck the way it turned out, maybe a bit too straight, but to me it played nicely.
The only problem is that now I got a lot of string buzz on the low B-string, mostly on the lower frets.

How would I best resolve this: by raising the saddle of the low B-string only or by loosening the neck a bit to give it a bit more bow (it did seem the be almost straight after the adjustment).
Is there anything I need to keep in mind when adjusting the truss rod in terms of how often I adjust it? Like after adjusting it one way and then realizing I may have tightened the truss rod a bit too much, do I need to wait a few weeks before adjusting the truss rod the other way by loosening the truss rod? Or is it ok for the neck and truss rod to keep adjusting back and forth even from one day to the next? I always only do small adjustments at a time either way (so two quarter turns max).

Another thing I was wondering about: I know humidity changes with the seasons and can have a big influence on a neck, so would it be best to avoid truss rod adjustments during a certain season? I believe I heard or read somewhere that it’s recommended to do truss rod adjustments outside of the seasons where the heating system in the house is on? Is there any truth to that?

Thanks,
Lars