When tO start budding my plants ? Been 9 weeks

I would go for it now, might allready have done it if they were mine 🤗

Go for it , 9 weeks in veg it's plenty of time it will fill the space when in flowering keep them tuck under the scrog to maximize footprint

They rang from 10 inches to 15 inches and I’m growing in a 4x4 grollia tent

if you have filled at least half the space, it's probably golden. expect the plants to double in size at minimum.

It's going to depend on how much room you have... they will stretch madly as they go into flower so if you don't have a lot of head room, that's something to consider... If you feel the plants are a decent size and you don't want any more development of bud sites, flip! Good luck!

I would now as they will get a lot bigger during the stretch stage (1st two weeks in flower)