Inspired by vernacular from Soil Science and Climatology), Prime Solum means “an ideal place to grow something”, in this case, prime Napa Cabernet Sauvignon! Prime Solum Napa Valley is a blend from carefully selected vineyards in the Napa valley Appellation. The same skills that guide Bill and our team in developing great vineyards, help us find the best among vineyards planted by others. From these carefully selected vineyards we make wine of distinction that are true to the best character of Napa Valley. Sourced from Brokenrock Vineyard and Circle R Vineyard.