Tee ~ I live in Santa Rosa, an hour and a half from SFrancisco. But I just moved couple of years ago from New Mexico and so the list that Kristi provided listed pretty much the usual suspects you can count on to survive cold temps. But I am more the semp and echeveria and sedum type so most of the non semps were inside a greenhouse year round (cause the problem outdoors during the nice weather were the thirsty rodents).
Loved the pic of the laid down Opuntia pads and their new growth. It wasn't until I lived in New Mexico that I found out that cactus can be part of breakfast or lunch and used to make jelly.
Kristi ~ when I worked at a nursery in NewMexico, I met folks from Texas that said they had vacation houses in New Mexico to do their gardening!
