tastyratz

I can't answer that question, but maybe have helpful ideas?

ya know if you REALLY want to extend the season... I wonder if you could wrap the tree with old non led rope lights? Might look weird but Orange lights would look less out of place in october than a blooming banana tree in the north?

Maybe some black trash bags over the roots to keep extra water from rotting it and getting what sun heat remains? could put another rope light under the bag too...