Last winter we saw on a local gardening show this handy tip for saving citrus trees from a frost: Giving them a good watering and stringing branches with little white Christmas lights. So much easier than trying to haul the split wine barrels they are in into the garage or covering the trees in plastic sheeting.
And don't you think this looks nicer?
Our wee orchard consists of two figs (black mission and brown turkey), a persimmon, a Persian lime, and a Meyer lemon. The figs and persimmon are perfectly happy with the cold weather, but the citrus are easily damaged, and once they've been zapped good by a frost, it's hard to bring them back.
With their lighting systems, we're hoping they will be bringing us fruit for many years to come.