Wow, kind of funny Santa Rosa would be colder then Davis, but we've had several sub-freezing nights so far this season. The Saturday morning following Thanksgiving was the first and worst so far -- 27F. My citrus faired well; however, the avocado tree that came with the house was heavily damaged. It was on the come back from last year's December cold snap and was sprouting light green, tender fall growth. Most of that is now black and dead. My recent banana aquisitions -- you guys are a bad influence
-- are all safely in the garage, as they are still in nursery pots.
Although we had several sub-freezing nights, the frosts have been limited. My citrus are all huddled together on my deck, under a sun-shade canopy. On the nights it looks like we may dip below freezing, I plug in the christmas lights strung across the pots. On a few nights I've clipped old bed sheets across the open sides of the canopy to contain as much of the heat as possible.
Kent