See I also changed the light cycle a few weeks ago I had them on a 20 hour now they are on 18-6, but if that’s a way to tell if the plant is male early then it saves me the worry of it herming in flower. Usually at the grow I’m at they start herming around weeks 2 and 3 it seems. But the seeds were from a buddy of mines harvest from last year. So I’m hoping they don’t herm but we will see!!!