Hermann is an American Viticultural Area (AVA) located in northern portion of Gasconade and Franklin Counties on the southern banks of the Missouri River. It was established on August 18, 1983, by the Bureau of Alcohol, Tobacco and Firearms (ATF), Treasury after reviewing the petition submitted by Jim Bias, president of Bias Vineyards & Winery, and Jim Held, president of Stone Hill Wine Co., on behalf of local vintners proposing the viticultural area in central Missouri, along the Missouri River, known as "Hermann." The wine appellation is named after the town of Hermann, about halfway between St. Louis and Jefferson City. The AVA expands across the northernmost hills of the Ozark Plateau with many of the 200 acres (81 ha) of vineyards planted along south-facing slopes. As of 2007, seven wineries were sourcing grapes in the appellation, including Missouri's largest winery, Stone Hill Winery.The area is a flood plain with alluvial soil deposits up to 30 feet (9.1 m) deep. Growing conditions have been compared to those in southern and eastern Germany. The hardiness zone is 6a. A wide variety of grapes are grown in Hermann, including Vitis vinifera, Vitis labrusca, and French hybrids.