Château Calon Ségur is based primarily on Cabernet Sauvignon, the king grape variety of the Médoc, which represents the majority of the estate's plantings. It is complemented by Merlot and Cabernet Franc, which bring roundness and aromatic complexity to the final blend. This varietal profile gives rise to age-worthy wines characterised by a firm tannic structure, aromas of dark fruits, cedar and spices, typical of the clay and gravel terroir of Saint-Estèphe.