"A lot of these annuals will get damaged at 35 or 34 degrees." says Darin Engh as he covers his plants at the Petunias and Pomegranate nursery in Alpine."
This weekend's weather could cause problems for nurseries around the county. The national weather service is forecasting some of the daily high temperatures to be some of the coldest in decades, and the possibility of snow dropping all the way down at 1000 feet.
"There's a lot of people in this area that heat their homes with just propane," she says, "I mean all day long people are coming in filling up propane tanks."
As for those with nowhere to go home to, 9 emergency shelters have opened up around the city of San Diego.
In the meantime, Darin Engh says snow would actually be a good thing. It's the cold weather he's following the rain and snow he's worried about.
"The snow will actually act as an insulator on the plants themselves," he says, "Sunday night I think is going to be the killer for us up here, so we really watch those temperatures as it moves out."