It is really hard to say on the sex. I would say let it go a little longer on the 18/6 if you are still on it and you can begin to tell a little more, then once you start the 12/12 it will begin to really show the sex. You want your plants to grow more than that too before you flower so you can get a decent amount of buds from them.
rnf232s Reviewed by rnf232s on . Could use some really good advice please. I think I really messed up initially starting my plants off. Below is my sequence of events. But any advice after reading I would greatly appreciate. For example, though I am in my sixth week. The plants are too premature to start on 12/12 lighting. SOLEY due to my ignorance of starting them off on 12/12 lighting. Should I just keep them at 18/6 now for another 2 weeks or so. And then flip them back into 12/12 to help me better determine the sexes. I am including a couple small picks of Rating: 5