Joyce we do have some mature ones in the area. Ratty looking by Hawaiian standard, but not bad at all. Being on a dolly I hope I can wheel it to a good winter spot.
Zone 10 but still an occasional frost, but only for a few hours. Many years none at all.
It is the Royal Ponciana tree that is my concern. i plan to do to it what you did to your bananas. Mulch, mulch and more mulch. I have 3 bales of straw handy.
I planned to ask you on tips for winter protection.