Plastic tarps are covering crops like lemon grass and sugar cane at farms in Fresno County.
Bentley Vang sells his fruits and vegetables at the Berkeley Farmers Market. His spinach crop has already been damaged by the cold. Other farmers say the lack of rain is also a problem.
"We hope Santa Claus brings us some rain for Christmas. We all do. We're all concerned with the little rain we've had this month," said Tom Willey, a Madera organic farmer.
The freezing temperatures are also a big threat to lettuce and potato growers. While citrus growers say they're safe, unless temperatures dip below 26 degrees for a long stretch of time.