Winterizing Exotic Trees for cold climates

A insular blanket that wraps the stem or trunk of the tree that protects the trunk from freezing in the winter. Can provide insulating characteristics through specialize materials and could be complemented with heating coils within the blanket that slightly heat the blanket through a battery, solar or power source connected to the house. If a battery is used it could be charged by solar or wind power plant.

http://www.seattletimes.com/life/lifestyle/exotic-banana-plants-survive-winter-if-they-get-shelter-from-the-elements/