you cant tell a sex untill ya flower so put them under 12/12 and by week 2 you should be able to tell if ya are wanting to reveg just change the light cycle back to 18/6 and it will revert back in to the veg cycle without any probs but ya cant reveg once the bud starts getting big i think this will stress out the plant and turn a feamle into a male so try and do it in the first couple of weeks
cheers hope this helps
busteruk7 Reviewed by busteruk7 on . Sexing My son and I are debaiting help us out. I have put our babies under 12 and 12 to start flower to sex, plan on reverting them and weeding out the males. He says that is not needed, that the females leaves will be 7 fingers or more? Also I have sexed some in 12 X 12, how long will it take to revert them to veg on 18 X 6 hrs. Using 400 watt MH to veg, 250 MH to sex with.:question: :question: Rating: 5