24/0 and 18/6 are BOTH vegetative light cycles. The plants will not show sex until you do 12/12.

I use 18/6 cuz its closer to natural cycles and saves some electricity. Some do 24/0 for more rapid growth.
smoknjoe Reviewed by smoknjoe on . I just switched from 24/7 to 18/6 Do you think that will be good for my plants to start showing there sex heres some pics please give me some input on this should i leave em on 24 or go with the switch and keep em on 18/6 they havnt hit the dark cycle yet so i will be able to switch back to 24/7 easy LET ME KNOW Please thank you heres pics Rating: 5