The Irishman Bernard Phelan acquired the Domaine Le Clos de Garamey in 1805 and Ségur de Cabarnac in 1810. In Ireland, he was a neighbour and friend of Hugh Barton who established Château Léoville-Barton. By his death in 1841 the estate combined to form Château Ségur de Garamey, which passed on to his son Frank Phelan, 30 years a mayor of Saint-Estèphe. The property was sold in July 1919 to Joseph Chayoux, President of Champagne Chamber of Commerce, whom further developed the brand until before the first world war when the property was sold. It was bought by Xavier Gardinier in 1985 and is now run by his sons, Thierry and Laurent.
Phélan-Ségur's 66 hectares of vineyards are well-sited near the Grionde estuary and lies on well drained gravel soils.
Frank Phelan is the second wine of Chateau Phelan Segur. It was first made in 1986. It bears the name of estate founder Phélan’s son. Frank Phélan was a man of character, mayor of Saint Estèphe for 30 years.
"As with nearly all the wines of the Médoc, the tenderloin of Bordeaux where the majority of classed growth châteaux are situated, prices have begun to move well beyond anyone other than the super-wealthy: even attractive mid-range players such as Irish wine geese Château Phélan-Ségur have drifted into these higher pricings. Happily, then, the second wine of Phélan-Ségur - named Frank Phélan after the son of the founder, Tipperary man Bernard Phélan - is at a dear but sensible €36 at Mitchells. The 2011 is a supple, ripe-fruited, polished affair with smooth tannins, fine acidity and a medium-bodied finish, it is quite savoury despite a dominance of merlot in the blend, but it is showing well now and has another couple of years of evolutionary potential. At this price, it is perhaps one of the last reasonably priced, authentically venerable Bordeaux wines." - Tomás Clancy, The Sunday Business Post, 05 June 2016