Thanks, Vickie! This is a good, elevated south-facing porch of an old house. The tiled surface is a good heat-sink, too. And, being located in south Alabama helped, too! These vincas surprised me, though. My wife wanted to give up a time or two...preparing to go to bed at night but being detouring into going out in the cold to cover up some scraggly plants just wasn't that appealing to her...or me!
But, we managed somehow. I'm not sure we'll try for a second winter or not...we'll see how they look at the end of the summer.
One thing I will say, it was nice to walk out in the winter on pretty days and see those pink blooms glowing in the light of the low-riding sunshine!