Château Phélan-Ségur is a St Estèphe property that produces textbook meaty, solid and long-lived St Estèphe. Founded by Irishman Bernard O’Phelan, the estate was developed by his son, Frank, and renamed Phélan Ségur in the early 20th century. It was bought by Xavier Gardinier in 1985 and run by his sons, Thierry and Laurent until 2018, when Philippe Van de Vyvere bought the property.
Phélan-Ségur's 70 hectares of vineyards are well-sited near the Grionde estuary, lying on well-drained gravel soils, bordered by those of Château Montrose and Château Calon-Ségur.
The grand vin is normally a blend of at least 60% Cabernet Sauvignon, with Merlot and a touch of Cabernet Franc and/or Petit Verdot. The grapes are fermented in temperature-controlled stainless steel vats and the wine is then matured in oak barriques (maximum 50% new) for 16 months. Phélan Ségur usually requires at least five to seven years of bottle ageing to show at its best, and the finest vintages can continue improving for up to 15 years.