Originally Posted by palmtree

I havent cold tested too many plants but super dwarf cavendish stays pretty green down to 30F for me and actually looks okay down to about 28F which is pretty unusual for a banana. Also I think musella is just a generally hardy plant (and also apparently pretty cold hardy too). Mine got chopped down to the ground as a small plant (not sure how it happened) and is now sprouting back from the roots and I found that pretty interesting since it was a weak and almost dieing plant.
Thai black is also suppose to be one of the more cold tolerant bananas but I wont be testing that until it makes some pups.

Good luck!