Morning, Kiska! (I think it's still morning there.) 57 sounds kind of nice on a triple-H afternoon.
Louie, they aren't really hardy above zone 9. I'm in 8a, so I dig 'em and pot the up for winter and set them back out in spring. I did try an experiment and left one in-ground this past winter. It survived, but is way behind the ones that were kept warm.