2) RHODELISATION
This is the name the breeder Soma gave to the process by where a very mature female at the end of her life throws off a few pollen bananas. This resulting pollen is feminised, but as if it had been induced by old age rather than CS. This doesn't always happen, it takes a very long time for it to happen, it usually requires taking a female beyond her usual harvest window, and it doesn't result in much pollen at all, so it's very much hit-and-miss unfortunately.
So if you over grow your plants they will try to polinate itself for survival.
I took this from the article on how to make feminized seeds. It is a good read and I don't want to take credit for it so here is the site.
http://www.icmag.com/ic/showthread.php?t=60610&page=1&pp=15