Bananas fully hardy in zone 6
Just a follow-up posting to my mulching question...
Musa Mekong Giant IS hardy in Michigan down to at least -13 degrees with about 10-12 inches of cedar mulch piled on top and nothing else. No tarps, trash bags or fungicide. Just mulch as protection.
The same is true for Musa Basjoo, although I was surprised to see that Mekong Giant started regrowing only a week after Basjoo. All stumps of both varieties are regrowing from the main plants, so they should be HUGE this year.
Now I'm waiting for one of my Dwarf Orinocos, although the smaller of the two is showing signs of life.
By the way, this was our snowiest winter ever, so no lack of winter moisture and nothing to protect the banana corms from that moisture. All were established bananas.