to tell you the truth, is that if you are too young its not a good idea, even if you are not, if your parents are gonna freack out if they realice you are growing, then its not a good idea. The parents are not stupid and they will realice 99% sure...

So i would recomend you 2 options, go outdoors... like someone is gonna explein you how. Or talk directly to your parents and tell them you are gonna grow in a closet, so they wont freack out if they realice you are growin, they are gonna be like you are fucked up, but you do whatever you do (as long as you are not a young person under 18 years old).

anyway good luck