Address: 5795 Silverado Trail, Napa CA 94558 / (800) 366-6516
About Us / Hartwell Vineyards History: Hartwell Vineyards is unique even within the Stags Leap district. Though the entire area is covered in rich volcanic soil, our vineyards are planted on the slope of an actual dormant volcano. Our home sits right on top of the hill at the site where the last eruption happened four million years ago. Today, steep terrain, rocky soils, and the only granite rock in the Stags Leap District allow us to control the amount of water each vine needs. Exceptional drainage from the rocky slopes forces vines to conserve their production to just a few tight clusters of small grapes.