Thank you!
I'm in the East Bay right now (California) but I'm going to keep the tree up in Davis until the summer. I looked on the plant zone map and both places are classified as 9b and the key says it averages 25 to 30 F as a minimum. This seems about right, it has been close to freezing past couple of nights so I have put the tree inside my garage where it is cold but not freezing, and I have been keeping the tree outside during the day. I had heard about dormancy periods so I thought I wouldn't want to have the tree inside if the heater is on, how much do I actually have to worry about heat shock?