males show sex at 14 days while females take up to 21
dont use 12/12 you will decrease the final yield alot, mine have been 20/4 from seed and are at 7 weeks now and smelling PIFF DANK mmm god there nice oooooooh ahhhh
some people even go 24 horus with ak but thats another story
try LST tie the plant down if there to tall