I'm in Zone 6b. This old thread lists the plants in my "Desert Rock Garden", including yucca and Eastern Prickly Pear cactus which are native plants.
-- and if you follow the link in it, it'll take you to a photo when it was new.
I don't remember if I described how I constructed the garden over my clay subsoil anywhere. I'll look around. If I didn't I'll have to try to remember.