Founded in 1972, the winery and home vineyards of Joseph Phelps are located in Spring Valley near St. Helena, on a 600-acre ranch that is characterized by rolling hills, California native oaks, and 160 acres of meticulously tended vines. The first Phelps wine, 1973 Johannisberg Riesling, was introduced in the fall of 1974. Since then, production has grown to 100,000 cases annually, with Cabernet Sauvignon, Chardonnay, Sauvignon Blanc and Merlot serving as the winery's core varietals.