Half of all grapes used in wine production in California and a third of all those used in the United States are grown in Napa County. It's no surprise that the top schools for Viticulture and Wine Technology are located in Napa (Napa Valley College) and within an hour (the University of California, Davis).
"The Journey of a Vine from Bud Break to Harvest: Grapevine Growth Cycle." Beveryly Crandon: Wine with Me. Accessed 13 October 2025. https://www.beverlycrandon.com/post/the-journey-of-a-vine-from-bud-break-to-harvest