A question from a fellow grower:
Been in veg for couple months how late can you apply screen of green or sea of green methods
Well it’s not too late for either while still in veg but sea of green is typically done with small plants and lots of them. Screen of green can be started as long as you set the screen height right and still have flexible plant 
it’s that flexible part, young and easy to bend, not old and stringy hemp…best between waterings when the plants are dry, they bend easier…
you are training it
at a couple of months, maybe bend the stalk, gradually, carefully to get light to the lower branches and tuck larger leaves away is all you can do