how long after 12/12

Just wondering because I've never noticed before, but how long after I set my timers to 12/12 should I expect to see pre-flowers, or even flowers. I think I'm at 5 days of 12/12 and don't really see anything.

Welcome to the forum. You should be seeing some vigorous veggetative growth 5 days into 12/12 light cycle. Time it takes to show sex can vary, normally all will show sex within four weeks of 12/12. The males normally show sex first and are generally the healthies looking plants. VV