hey closet grower "how long should the shoots be coming thru the screen" i get the impression that you have vegged your plants out for some time and then added the scrog screen later on. correct me if i'm wrong. i personally have the screen in place from the get go. then as the main stem of the plant is the first one to penetrate the screen, it is the mesh size that dictates how far above the screen each stem has to grow before training. for example, i use a 50mm^2 mesh, so i wait for the main stem, the first to get bent, to grow about 75-100mm above the screen. this means that when i come to bend it and train it thru the screeni have sufficient stem to span the 50mm space to the next lateral of the scrog mesh and a further 25-50mm to poke thru the next space, thus anchoring it in position. (its hard to explain in words and i dont have suitable photos) now as the main stem is growing straight up, the secondary growth, lower down the main stem, is growing out at an angle from the main stem, thus taking the shortcut if u like, as opposed to the main stem which has grown straight up, followed by a 90 deg bend (thru the screen) then horizontal growth along the screen. this means that the secondary growth hits the screen at a similiar point that the main stem has reached, thus ensuring all stems propogate thru the screen at a similar rate. i am really stoned and babbling now...... i will return.