Unlikely to winter over well in your area......really needs a frost free climate, USDA zone 10 or higher or Sunset zone 17 and 21-24. I believe Davis is Suset zone 14.

Very close call. 20-30 years ago? No way. But I see some tallish ones in Pleasanton. Z14 Sunset. If you have a good mild winter,it might be up to colder winters later. Because it will grow fast in the long hot Davis summers.

Plant it under a large tree to provide overhead frost protection is your best bet. That or make it your Christmas tree this year.

I have a potted one I keep outdoors year round that has no problems and I’m north of Davis in 9b. I do keep it on a covered patio though so it’s semi protected from the elements.