That's what I had originally thought......flip this weekend for the rest...what do you think Penny, flip my 2 ATFs to determine sex, take cuttings off the female for clones ( fingers crossed) and reveg the adult then? I don't need to reveg the adult, just need that female to start my perpetual.
Guy, the plant will generally show pre-flower signs at about day 30 or so. If you have a loupe of some sort, you can start looking around nodes as they mature and you will either see the hair or the ball sack. Its really not terribly hard brother.
I wouldn't go the route you talked about.....putting plant in flower, sex it, then re-veg it. Thats a lot of unnecessary stress on the plant. The ATFs were very easy to sex so you should be able to tell relatively easily based on pre-flower. If you feel you need to flower something to make sure, I would flower a clone. Will take you about 10-14 days to root it, transplant it....give it a couple days and flip. You could have the answer to your question in roughly 25 days. But again, the plants will show you what they are generally. Hell wait long enough and you can generally see it with the naked eye.