Scrog Question: When to stop?

At what point do you stop tying down? Right to the end of the stretch?

about 2 weeks into flowering

do most strains stop stretching when they hit 2 weeks into flower?

no. but u want ur buds above the net.

depends totally on the strain and how you want the finished product to be. I like to scrog to get the height all the same and extend the veg a while without adding height. I let my plants get up to a foot over the screen by the end of flowering sometimes. some ppl like to keep the buds just right above the screen, so its really all about your personal goals.