From that pic, I'd say they're ready for 12/12. No way to know for sure unless you've grown that strain before, Scrog takes a couple times to master.

IDK about the 36 hours thing... just start 12/12, they'll know what to do :jointsmile:
bigtopsfinn Reviewed by bigtopsfinn on . ScrOG, Is it time to flower? Hi all, This is my first scrog attempt and I??m still a little confused when to start 12/12. I hear start when the screen is 40%, 50%, 70%....full. I??m sure It has a lot to do on the strain, which will tell you how much it will stretch, which will tell you how full the screen should be before you go 12/12. This strain is Blueberry, under a 30? by 36? screen. Screen is 9? above the pots. 400w HSP, on 24 hours a day. Using the Lucas formula at 0-8-16. Is it time to go Rating: 5