You could switch to 12/12 lighting if you haven’t already. Sometimes autos need a little push to flip to flower
I may be mistaken but I think the OP is growing feminized photos for the first time.
@wonpoke if this true then you can flip to flower whenever you want to. Your plants appear to be old enough and they look healthy.
@merlin44 is right, I thought they were autos. If these are feminized photos they are certainly mature enough to flip. Keep in mind that the may stretch to twice their current height after flip.
These are feminized that I have been LST training for about a month and a half they’re very healthy and have quite a few bud sites and I have plenty of room to let them grow. I thank you guys for your input my son was telling me it’s time and I thought I’d just reach out I love this site thank you