emegar,
I have two small plants as well as four seedlings, all in pots right now. All of them did just fine outside this winter, even with unusually low temps of 34 F for two nights in Jan (with 4 or 5 nights in the mid to high 30s).
For what it is worth, I am in coastal San Diego, Sunset zone 24, about 1 mile from Torrey Pines State Beach.
Hope this helps,
Richard