New grower. When to flip to flower?

New grower here. Bubba kush and Girl Scout cookies photo. How do I know when to flip to flower?

Look nice! I’m a first time grower but They look like they are getting perfect ttemp and light.

They look mature and healthy to me. The longer you let them veg the bigger they will get once they stretch during flower (they will almost double in size) I usually let mine veg 4 to 6 weeks before flipping.

It depends on the room you have and the yield you expect. Photoperiod plants won’t flower at all until sexually mature as well.