That grow OP is way too cramped and it really doesn't seem like his got other places for them to flower.
He should have used that tent to veg em, staggering their growth by 2-4 weeks and had a seperate tent for flowering so he could harvest every few weeks instead of all at once. It'd also give the plants more light if they're staggered as they won't be bunched up.
It'd be a massive pain to manage them that way as you'd routinely have to pull them all out to get to the ones in the back. That'd do your back in lol.