Certified Organically Grown. The family is committed to growing grapes without the use of chemicals. Certified by the California Certified Organic Farmers, Oakville Winery uses organic vineyard management techniques. Selective leaf and shoot removal reduces fungus and mildew pressure. Cover crops like oats, peas, mustard and vetch, are planted between rows to naturally inhibit soil erosion, reduce dust, restore nutrients and encourage microbiological activity. Even grape skins and stems are composted after harvest and added back to the soil, replenishing nitrogen and potassium and increasing microbiological activity. We believe that the attention to detail it takes to grow organically replenishes the land and creates better wine. We have grown organically since 1991.