Château Boyd-Cantenac is a 42-acre estate in Cantenac, Margaux. It is a third growth estate according to the Bordeaux classification of 1855. It was established in the 18th century by the Boyd family of Ireland, though it was later owned by John Lewis-Brown, who was related by marriage to the Boyds and who also owned Château Cantenac-Brown. In 1932 the Guillemet family purchased the estate, and they still run it today. The wine is a blend of 60% Cabernet Sauvignon, 25% Merlot and 8% Cabernet Franc and 7% Petit Verdot. About 70,000 bottles are produced a year. The second label is Jacques Boyd.
Margaux is one of Bordeaux’s most famous appellations and also one of its largest, with about 3,400 acres of vineyards. Located on the Left Bank of the Gironde River, Margaux has the greatest number of classified-growth châteaux (or crus classé) according to the 1855 classification. There are twenty-one crus classé, including the most famous estate, the first growth Château Margaux. The Margaux appellation includes vineyards around the village of Margaux and the villages of Arsac, Cantenac, d’Issan, Labarde and Soussans. Wines from the best Margaux châteaux and vintages are prized for their perfumey fragrance and elegant, silky mouthfeel. Margaux wines are predominately Cabernet Sauvignon blended with Merlot, Petit Verdot and Cabernet Franc.