i have a plant thats 17in. tall but im not sure how old it is because i got it from a friend it was an outside plant but when i got it about 3 or 4 days ago its been inside my grow box on 12/12 since i got it i cant tell the sex of it yet or anything should i keep it in 12/12 to let it show sex and flower i have a height restriction of 3 and a half feet im also considering lst it can someone give me some sort of direction or guidance