Answer: Musa basjoo is the hardiest of all banana plants and should survive in an open-air atrium, even in your cold and snowy winter weather. This plant will regenerate new growth from the roots if the top is killed by frost - provided the rootmass is protected from freezing. You can protect the roots by covering the soil with some insulating mulch, or planting the musa in a part of the atrium where snow does not fall onto the soil. Best wishes with your landscape!
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