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Traditionally, the wines of Saint-Emilion are a blend of different grape varieties, the main ones being Merlot, Cabernet Franc (or Bouchet) and Cabernet Sauvignon.
The quality of a wine obviously depends on the organoleptic potential of the varietals: sugar content, aromatic complexity, the quantity and elegance of the tannins and the intensity of the colour.
Each grape variety has a personality of its own, resulting from its suitability for the terroir, i.e. the climate and the soil. To obtain the highest possible quality, the winegrower selects the terroir whose cropping characteristics will allow the vine to thrive.
In Saint-Emilion, as elsewhere, the grape varieties are planted in different proportions.
Merlot - This is the most common variety, accounting for 60% of the vines in Saint-Emilion. Merlot is an early variety that does well on most Bordeaux soils and especially like the cool, damp, clayey soils of Saint-Emilion.
It ripens well and gives the wine colour, good alcohol content ("generosity"), good aromatic complexity – particularly of ripe red and black berry fruits – making them supple, rounded and very silky in the mouth.

Merlot
Cabernet Franc - Planted essentially in the Libourne area, Cabernet Franc accounts for some 30% of the vines planted in the Saint-Emilion appellation. A later variety than Merlot, it is most often found on limestone soils and those with a slightly warmer texture (sandy and gravelly soils).
It gives the wine slightly spicy aromas, well marked freshness and tannic structure, making for wines that will keep for years.

Cabernet-Franc
Cabernet Sauvignon - Representing around 10% of the vines planted in Saint-Emilion, this is a late variety that is particularly suited to hot, dry soils – sand-and-gravel or well exposed limestone-clay.
It gives the wine complex, spicy notes and a wealth of tannins that help the wine age splendidly and harmoniously.
The Saint-Emilion and Saint-Emilion Grand Cru Controlled Appellation decree also allows the use of two other varieties: Malbec (or Cot) and Carmenère. Only Malbec can still be found from time to time.

Cabernet-Sauvignon
Since the phylloxera epidemic that ravaged the French vineyards in the late 19 th century, all the varietals have been grafted onto rootstocks that have a natural tolerance of the insect that carries the disease. So today, the part of the vine above the ground is the actual varietal and underground is the rootstock onto which it was grafted.
Grafting is generally done by professionals to very strict specifications. For many years now, winegrowers have been using plants that are certified as being genetically homogeneous – this is what is known as clonal selection. Using plants of this type means that there are no major variations in vigour or production. The grower chooses the rootstock that is most likely to make for a vigorous, productive vine in the soil in which it is to be grown. Different types of rootstocks have varying degrees of resistance to drought, humidity, and so on. When selecting a rootstock, an important consideration is its reaction to certain types of limestone soils that can induce a disease called chlorosis.
In Saint-Emilion, the most widely used rootstocks are, depending on the soils, 101.14, Fercal, 418, 420A and 3309.
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