Brendel likes to say that they have a secret ingredient: dirt. Their range of wines are made from some of the best sites in Napas most renowned regions, including the eastern side of Rutherford, the highest elevations of Howell Mountain, two diverse sites in St. Helena, and a steep plot in Oak Knoll. Each vineyard is chosen for its quality and unique aptitude, with soil types ranging from volcanic to clay to bring out the best in each grape in their array of wines. Its, as they put it, good dirt.