hi guys ,i was wondering if there is a minimum age or height you can put a plant into flower .my problem is im doing a stealth grow in a chest of drawers that are about 3ft in height.my plants were planted about 3 weeks ago maybe more and are just under a ft tall and really healthy.i have read that the plant will double or even trebble in height once in flower ? so u can see my problem. last grow i started 12 / 12 from seed but i ended up with males

.i know yeild is going to be poor ,but theres nothing i can do about that at the moment cause im having to do this really stealthy.and cant move to a bigger grow space.so my main question is will the plants flower ok seeing as they are young ? my guess is yes coz people grow 12/12 from seed ?
thanks in advance guys