Lake County, Calif.—Shannon Ranches will oversee production, sales and marketing for Guillaume Grapevine Nursery in Knights Landing, Calif. Shannon Ranches is a vineyard management and development company that is affiliated with Shannon Ridge Family of Wines. The company manages more than 4,000 acres of vineyards in the North Coast of California of which more than 1,000 are located in Lake County and support the Shannon Ridge wine brands. Guillaume Nursery is the U.S. subsidiary of the Guillaume family nursery business that is based in Charcenne, France.