Ya can take leaf at any stage. I doubt many stress their plants as much as I do in veg and flower. Makes me scratch my head when folks say....don't do that..
I say why?
I remove leaf, bend, crush, and manipulate plants deep into flower if they need redirected or they are blocking light with their leaves.
I think my threads speak for themselves on this myth of stress in flower. Maybe I'm a BDSM grower..
I dunno. But I've never received bad or stunted growth. Nor have I caused the dreaded hermie so many say will happen if you stress in flower. I disagree. That's usually genetic if it happens ..