help plzz

my trees are outsidee i just find it hard to tell the female from male ect . .. i started them the start of june a lil late i kno but they look really healthy and growing like crzy.....but, do i remove leaves ? i need some helpp -_- they are about 4 feet 8 inches do i have to cut leaves off to make progress what ? i guess i should have done more research b4 i started haha .... :weed:
 
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