UC Master Gardeners of Napa County is a volunteer organization associated with the University of California Cooperative Extension. It provides educational programming and services to meet the horticultural needs of Napa County gardeners. The organization provides a free help desk to answer gardening questions, a specialized team for hobby vineyardists, public workshops, special events, speakers and more. Individuals can contact UC Master Gardeners of Napa County in person, by phone or online.