From the time that they are obviously malesâ?¦.you have 10 days to cull males. So you can wait until youâ??re sure. If youâ??re not sure what that looks likeâ?¦start searching and looking at pictures, there are plenty posted on this site.

Best of luck,
HMR
Horsemanrocks Reviewed by Horsemanrocks on . How long till pollination from males? This is my first grow and I just put my plants on 12/12 from 24 last night. I have a beautiful 2.5ft female sativa who is in pre-flower, and the other plants have not shown their sex yet. I was wondering how long does it take in 12/12 for the males to pollinate? Being that the other plants have not shown their sex, I do not want to go and trash plants that could be female, yet I will destroy all males at first site. My concern is that pollination could take place. I of course do not want to Rating: 5