With a history dating back to 1143, Chateau du Tertre is one of the oldest properties in Bordeaux. Since 1995 it has been in the hands of the Jelgersma family, also owners of Chateau Giscours. The du Tertre vineyard is a large single block, with 52ha under vine, planted to Cabernet Sauvignon (55%), Merlot (27%), Cabernet Franc (11%) and Petit Verdot (7%). Biodynamic viticultural techniques were being introduced beginning in 2008 and du Tertre was one of the first in Bordeaux to ferment grapes in egg-shaped concrete vats. The property produces a second wine, Les Hauts de Tertre, and from 2014 a dry white wine, Tertre Blanc, an unusual blend of Sauvignon Blanc, Chardonnay, Viognier and Gros Manseng. This Margaux property was classified Cinquieme Cru (Fifth Growth) in 1855.