The grapes come from estate vineyards in the Sonoma and Russian River valleys, as well as from growers in Sonoma County's other top appellations, including Alexander Valley and Rockpile. All grapes are hand harvested, gently destemmed and crushed before cold soaking to extract optimal color and flavor. The fruit is then inoculated with many different yeast strains to build complexity, and fermented in separate lots using a combination of pump-overs and rack-and-return to soften tannins. The wine is matured in oak barrels.