flowering early

my son inlaw has 3 plants. one of them has taken of in hight and is starting to show to show pistles. he is still on 18/6. is this posible, if so how can he aresst it till the others catch up.Any input would be appreciated.

Thats normal, just continue on and kill the males when they show balls

I STARTED MY plants in jiffy pots in early june its the end of june and for some reason there flowering a small bud on top , there too small just 4 inches high there 3 weeks old why are they flowering so early it recs my crop everytime i do everything right a little info would be helpful and aprreciated

my plants are flowering already ?? but just 3 of them (i have 18 all together ) so why would just 3 of them start flowering ?
this may sound stupid but i also wonder if my clones could change into males ?