Re: About musa acuminata seeds...
I might have overzealously used the work "cold hardy" and would like to replace it with "cool hardy" since I haven't tested it outside yet. It was smaller than the Musa balbisiana that I grew from seed and showed just as much hardiness inside an unheated glass house in zone 7b-8a(got down to 7F twelve years ago nearby), and it is the coldest microclimate in the area. Not sure what the actual low was this year.
I'll bet it is from a edible cultivated hybrid in Southern China(wish bananatree would get some more info on this one). I'll post some pics when they get bigger.