These few days of cold weather will likely burn some ficus trees and freeze the buds on lemon trees. This is the third or fourth time in 10 years that it has been cold enough to damage our Lisbon Lemon tree. We'll prune it back and have a year of nearly no lemons (as opposed to this year when we have a few hundred). These cold spells don't bother our grapefruit tree, perhaps because it grows in more of an umbrella shape that holds in heat better.
After spending several years nurturing a plant to maturity and losing it to one night of cold I surrendered and put in something better suited to our climate. We can't cover our lemon tree because it is so large, but it gets along fine.
One thing we will cover is our backflow assembly on the irrigation line. We've had that freeze before and it was no fun buying a replacement - since thousands of people in the southwest had the same problem and the stores were out of stock. So there is a painting cloth over our water pipes for the next few days.
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