Take all the clones u want now, before its too late. It usually takes a few days of 12 12 for flowering to really kick in. So if u take now, u will be good
you can safely take clones as far as 21 days into flowering. flowering clones will give you very bushy plants. the longer you go into flower before taking them, the longer it will take them to revert back to veg.
Lawl... use the "Search" function, you'll find several threads where farmers had successful clones up to harvest day; but dont expect that to happen often. Before flower is prime because it doesnt force it back into veg, possibly causing hermie.