I have musa icecrea. That i have grown indoors under a light and heat mat in a 18 inch pot. I live in a zone 9a wnd was wondering what to do now that it may start to get cold. I want to plant it outside but I think it is too late in the season. Do I wait for spring? Any care tips would be helpful. It is currently 5 feet tall 4 inches tall from the bottom of the pot.