Quote Originally Posted by Weedhound
Ok well here's another way to do it......Go to 12/12 lighting. When you can tell which are males....get rid of them. Don't switch back from 12/12...what would you want to do that for? You'll lose a good month of time. Once the males are gone just let the females finish. How hard is that?

That's the most people who don't wait for preflowers do....go to 12/12, wait and see which are males, then get rid of them.

Ps...I'd be pretty careful tossng that Reverse around on everything. The directions are very specific and I woud follow them if I were you. The DM penetrator doesn't do anything by itself.....it's to add to things.
yea i was talking about when they were still to young to flower i wanted to know how soon i could tell without waiting for the 12/12 cycle