wait for preflowers at the very least.....

switching to 12/12 before preflowering can stress and lead to hermies/males.

even after preflowering showing definite sex can take a long time....but at the very least
wait for preflowers.....

you should start to see them at the 4th week of veg growth or about 6 weeks total time...but it can take longer....

patience my friend!
FireTheft Reviewed by FireTheft on . ready for 12/12 flower? pics I am currently at about 3.5 weeks from seed. I have 3 fat bushy plants from 6-8" and 5-7 nodes with no signs of preflowers yet. Is it too soon to switch to 12/12 or should I be fine now? I am also limited on space big time, I have LST on two plants, and don't want them to out grow the cabinet. Rating: 5