Château Grand Tertre – Red Designation AOC Côtes de Castillon Vineyard Size 12 hectares Soil type Clay and limestone Vine varieties Merlot 85 % Cabernets 15 % Planting density - Average vine age - Vine growing conditions - Pruning method - Grape harvesting - Vinification Alcoholic fermentation in thermoregulated stainless steel vats, Maceration from 2 to 3 weeks.Malolactic fermentation in same vats. Maturing - Ageing 18 months