THE CLASSIC GRAPE VARIETIES OF BORDEAUX

Contrary to what one might expect, it is Merlot, not Cabernet Sauvignon, that is the most important grape variety in Bordeaux. Cabernet Sauvignon represents only 27 percent of black grapes cultivated in Bordeaux, whereas Merlot accounts for more than 58 percent. It is nearer the truth, therefore, to say that Cabernet Sauvignon gives backbone to Merlot, rather than to suggest that Merlot softens Cabernet Sauvignon (which is the old adage). Although Château Mouton-Rothschild contains no less than
90 percent Cabernet Sauvignon, it is an exception, as even on the Médoc’s hallowed ground, where it is blasphemy to mention the name of Merlot, 40 percent of the vines grown are of that variety. Château Pétrus (see p123), one of the most expensive wines in the world, contains 95 percent Merlot, without any Cabernet Sauvignon at all. Cabernet Sauvignon is a classic grape, quite possibly the greatest red-wine grape in the world, but its importance for Bordeaux is often overstated.
Sémillon is the most important white grape variety grown in Bordeaux. It is significant both in terms of its extent of cultivation and quality. This grape variety is susceptible to botrytis, the “noble rot” that results in classic Sauternes and Barsac. It is therefore considered to be the world’s greatest sweet-wine grape. Sémillon also accounts for most of the fine dry white wines of Bordeaux, but these are relatively few and lack prestige. Sauvignon Blanc plays the supporting role in the production of sweet wines, and is used to a greater or lesser degree for dry
wines. Many of the less expensive dry white wines are pure Sauvignon Blanc varietals.