At night it's about 10 degs, and the plants seem OK about it. The Lemon Tree (Eureka!) and the little stripey Orange are hardy to -10, so we're hoping it won't get down to that.
As a buffer zone this little suntrap is maintaining the inside of the house at a relatively stable 16 or 17, especially if we remember to close the door at night. It's quite nice, though, to walk on it barefoot, like when a quick trip to the bathroom is needed at 4am!
