For a farmer's market to be considered "certified," all the farmers and vendors have registered with the county Agricultural Commissioners office to guarantee that all the produce, nuts, eggs, honey, herbs, plants, meats, and cut flowers for sale are grown and harvested in California. The Santa Rosa Original Certified Farmers Market almost exclusively sells goods from Sonoma County. Vendors must pay a fee and sign an agreement that allows a county agriculture official to inspect their farm to ensure that they are growing what they sell.