Part of the grapes from Rennina and Sugarille vineyards are blended with those from Bolsignano, always on the southwestern side of the appellation, and those from Torrenieri in the northeastern area of Montalcino. While the soil in Rennina, Sugarille and Bolsignano is from the Eocene age and vary from a composition of silt, limestone, galestro, clay, pebbles and fossils, the soil in Torrenieri has a higher composition of clay, mixed with tuff and sand. The grapes from the different vineyards ferment and macerate separately; after 24 months of ageing in oak, they are blended and aged for another 6 months in concrete.