I've had my share of Nana's too, especially when growing regular seed which seem to react more to environmental conditions than feminized seeds do. Almost always though the nanas didn't appear until the plants were in full flower. I think it was kinda a last ditch effort at producing some offspring. I've gotten a few seeds from those grows but never tried growing them since they were hermies and usually those seeds almost always produce hermies as well. Unless your interested in growing them out a few generations, then it might well be worth a try! Looks like some great bud_ don't worry about the nana's_ to get much seed the flowers need to get pollinated earlier. cheers!