I'm not sure, but I think 53 is pretty cool for poinsettias. Mine's still inside. I have put it outside for a while on warm days but's it still lives inside.

I cut mine back a little when the blossoms died. I usually pot 'em up in fresh soil later- around May when weather's warmer and consistent, and cut back to 4 or 5". Then it lives outside until fall.

It's a lot easier to compost it and spend a few bucks on a new one next year, but there's no challenge in that.

Karen