It also depends on the age/maturity of the plant. The earlier you flip from seed, the longer it normally takes. I usually wait till the branching starts off setting.
If you wait until 2 or 3 weeks after switching to 12/12, you will definitely be able to identify males a lot easier, but you also run the risk of pollen sacs opening and releasing pollen. You should be able to discern a male plant around 1 week after switching to 12/12. Positive vibes...
So this week, discovered a male, moved it to another tent, but discarded that idea and tossed it. The first shot is the two days after initially discovering it’s male identity, ready to blow pollen all over... Anyway have three remaining females, and though one is still a little stressed, don’t...