The grapes come from the terraced plots of the Château de Saint Cosme, which are up to 400 meters above sea level and cover a total of 17 hectares. The vines have an average age of 60 years, the harvest is manual and the yield is 27 hectoliters per hectare. The very long maceration lasts up to 45 days and 70% of the aging takes place in barriques from first to fourth use, 15% in wooden barrels and 15% in concrete tanks. The wine is bottled unfiltered and unfined.