Second wine (or second label; in French Second vin) is a term commonly associated with Bordeaux wine to refer to a second label wine made from cuvee not selected for use in the Grand vin or first label. In some cases a third wine or even fourth wine is also produced. Depending on the house winemaking style, individual plots of a vineyard may be selected, often those of the youngest vines, and fermented separately, with the best performing barrels being chosen for the house's top wine and the other barrels being bottled under a separate label and sold for a lower price than the Grand vin.
In less favorable vintages, an estate may choose to release only a second label wine rather than to release a smaller than normal quantity of its Grand vin or a wine that would not be consistent with past vintages under that name. The practice has its roots in the 18th century but became more commercially prominent in the 1980s when consumers discovered these wines as a more affordable way to drink the product of a First growth or classified Bordeaux estate without paying the premium for the estate's label and classification. The opposite phenomenon, of only releasing a top wine in exceptional years (rather than in most years) is seen in Iberia (Spain and Portugal) in "Gran Reserva" reserve wine and vintage port.
From the producer's point of view, a second wine allows the winery to use a stricter selection for its Grand Vin, while still capitalising on its name and distribution channels in selling the second wine, which will be much more profitable than selling off lesser wine "anonymously" to be used in e.g. negociant bulk bottlings.
The practice of establishing a second wine began in the 18th century as way for Bordeaux winemakers to be more selective of the wine going into their estate label wine without wasting the remaining wine. According to records, Château Pichon Longueville Comtesse de Lalande shipped its "second wine" of the 1874 vintage to the 1890 World's Fair in Moscow, although La Réserve de la Comtesse would not be for sale to the public until 1973.Château Brane-Cantenac may have had a second label some time in the 18th century according to Decanter, but more evidently, Château Léoville-Las Cases first produced its Clos du Marquis in 1904, and Château Margaux followed with Pavillon Rouge produced from 1908.