BBC this is actually my 1st ever SCRoG and Outdoor so I am pretty much a nOOb when it comes to this but this is my theory on what I am doing. I know outdoor plants get super huge and grow very fast. I am using the Screen to keep her at bay pretty much. I let her grow alittle above the screen and then I tuck her back under in a part of the screen that is not filled yet. The ultimate goal in doing this is to have a very nice even canopy of colas come flowering time. As far as pruning, I havent really pruned her too much, but I will when its flowering time. Pretty much I want everything from the screen up to be nothing but nice colas that are getting light evenly distributed throughout the whole entire canopy. Like I said I am such a nOOb to SCRoG but it seems to be working nicely. I mean that is nothing but 1 plant under a 65" x 65" screen.
I am sure the professional SCRoG'ers will say I am wrong and they will probably explain it better. I am not to good at explaining things! Hope that helped a little. There is a SCRoG'er United thread on RIU I am sure they will help answer any questions you have.
https://www.rollitup.org/advanced-marijuana-cultivation/515987-enter-scrog-scroggers-united-post.html
I am going to make a Smoking Pipe out of that plants Stalk, its huge!!!
Peace Sixerz and enjoy this Summer Saturday HOT weather! Damn heat!
FM