Hi Rick
First, what do you call mild. We often go down to minus 5F, and a couple of years has seen our village cut off by snow for a few days. As for types. I only do it now with a few, as I only have a garden 50 x 50ft. I am drawing on interest from many years ago when I trained at Capel Manor horticultural college just outside London. This was only supposed to give a general idea for people to try. As I always try to get over to people when I give talks, is, If it doesn't work the first time try again until it does. Experiment. That is the way to learn. Also don't forget the U.S. is a little bit bigger than our little island, so what one person there may grow will be different to someone in another part of the country. Anyway I still stress to people have a go, it won't cost you anyting.
Regards
John.