1stgrow

hey guys in New to growing I was wondering how I can control my plant to stay small like in this video..

Hey guys! its my 1st grow and im currently on 4th week of veg. I'm using a coco coir potting mix and my plants are currently around 5" (because i tried mainlining) now onto my current status, im growing at a 24 sqm room at an apartment building, top floor, corner. I have no windows close to...