second grow first real genetics and first scrog question

here's the specs
4x4x7 tent
600w air-cooled hood
470 cfm fan
fan controller
7 1/2 gallon pots
ffoceanforest

strains
left-odin
right-smurfzilla
both by North genetics

the odin (left) looks to be a sativa dominant strain (which I know sativas can really stretch when flipped to flower). question is how long should I let this go before I flip it? I want to fill out the scrog but I don't want to runout of room. thanks guys.

Train your plants until you fill up the screen in horizontal space and then flip to 12/12 letting the plants flower in vertical space. Looks like you've got a lot of training to do.

After second review of your picture I would recommend that you remove the boxes from beneath your planters and concentrate on training your plants to grow wider. Use methods like LST and topping to make your plants nice and bushy. Hope this helps.