This is what i did, of course my plants were already 1ft 1/2 when i put them outside right after the last frost. I pruned mine every 3 sets of leaves(did this about 6 times) I have lots of tops and branchs. This has kept them at a decent height. As soon as i stopped pruneing the plants have really started to grow out and up. Still about a month left of veg they are pretty even in width and height about 4x4 couple are 5ft think i will have to tie them down. They just took off on me like crazy was not expecting such rapid growth. But if you prune them a couple times you should be set.
Peace dex,