Having come to So. Cal. from Eastern Wa. (Clarkston, which I still think of as home after 58 yrs), I've gotten a chuckle out of this thread. As you may know Ca. has tried to split the state every few years since it was formed. Never going to happen. I've been here since I was 10 and still don't know where the split is supposed to be. The National Weather Service radar maps show from the Canada border south to the tip of Nevada and east into Montana, including part of Arizona listed as PNW sector. That would include a lot of climate zones. Our LA weather reporters break it up by Metro, including orange County, Inland valleys, desert, and mountains. I, personally stick to Sunset climate zones because what grows well in Northern zone 10 isn't even available here until too late to plant. I really do miss the flora of the NW, and lurk on the west coast forum, just in case I can push the zone or find a better place to live, but I'm one of few from So. Cal, and I've noticed the SW forum is pretty thin too. From what I've seen on DG, when the areas get too small they turn into chat threads that nothing to do with gardening. If I want to talk about family, illness, or government, all I have to do is step out on my front porch! $00.02