It usually takes about a week to 10 days to show signs of flowering after the switch to 12/12 (if plants are mature at the time of the switch). You wanna snatch the males as soon as you see balls. You should have at least a week, maybe 2 before they open up and pollinate your girls. Best of luck and happy growing.I just switch to 12/12. I'm 2 days in and was wondering how long in should it be befor I see sign of the sex and how long do I have to snatch them dudes be for they pregnate my girls. Those bastards.
Yes it is.Thank for the info. I am not sure but I think some of them are starting to grow balls. Is it common for males to show their sex first. If they do looks like 6 out of 9 are dudes. That really sucks.