What kind of banana plant is it? I don't know if even basjoo is hardy to zone 3 but definitely is not in a container. You need to dig it up, cut off the leaves and stick it someplace where it won't freeze.

Even a less hardy banana would probably be fine after such a short time if you go ahead and put it someplace it can go dormant and won't freeze.

I am on the northern edge of zone 6 in the Ohio Valley. I need to winterize my banana plants. Is it best to just dig them up and cut the tops down to bring them inside or should I do something else with them? How far down can I cut the tops? Should I remove all dirt from the roots? Any help would be appreciated.

Thanks

where exactly do you live in the Ohio Valley