Jericho Canyon Vineyard
shallow clay-loam atop white volcanic ash
This is a 40-acre vineyard at the base of Mt. St. Helena, northeast of Calistoga. Very steeply terraced, it was planted in 1990 and 1993. The soil is a shallow clay-loam atop white volcanic ash, which provides excellent drainage and limits yields to between 1.4 and 2.7 tons per acre.