Merlot is the main variety used to make the blend wines from the famous French appellations, Saint Émilion and Pomerol. Italy is the country with the world’s most extensive area of vineyards, and Eastern Europe has a considerable large area planted with this variety. Apart from France, in California and Chile, Merlot vineyards are continuously extending further and its grapes express outstanding characteristics. Argentina houses 7,371 ha of Merlot. It is the fifth wine red grape variety in importance and in the past 15 years, this variety growing area has enlarged significantly, being the larger area in Mendoza and a considerable part of it in the province of Rio Negro. Merlot achieved great expressions in cold regions, such as Uco Valley, Alto Agrelo (Mendoza) and Alto Valle (Río Negro).