put the plant in when its 12-14inches tall, if its feeding ok and new growth is fine shel b ok to flower!! ul have a load of side branches and internodes off that 1 as it was chopped in a mega frenzie lol, topping is the easiest thing to learn with plants, ur bro must b fucking nutz!!!!!!!!!!! google search ''TOPPING A CANNABIS PLANT'' ul find hot to do it there no probs