All depends on your setup indoors as to how big to allow your plant to get before flowering. The beast can be good if you have other beasts with her, but if you have smaller ladies lighting can be difficult. When I run seedlings I like growing them without topping or training and between 30 and 36 inches is where I flip them, clones I run are run alone and usually top them or prune them to fit my needs and keep the girls about the same height. You ask 100 growers and you get 100 different answers, need to sort through them then try several different ways until you find what works best for you and your conditions. Don't follow the herd, follow what works for you it will make you happier and you will learn more in the process. Happy Growing