From the importer: "100% Malbec (aka Auxerrois in local parlance). The fruit for the "Château" bottling comes from estate plots totaling 5 hectares and averaging 40 years old. Combel's vines are all on soils are rich in limestone--typical of the Causse Calcaire, a limestone plateau of around 320 meters in elevation--but with a higher concentration of red clay and rocks compared to the soils for the entry-level "Pur Fruit" bottling. The farming is certified-organic and in conversion to biodynamics."