what are the five grape varieties allowed in a red Bordeaux?

Cabernet Sauvignon, Merlot, Cabernet Franc, Malbec and Petit Verdot.

These five red grapes are the components of a Bordeaux blend. Cabernet Sauvignon and/or Merlot are usually play the lead role, while Cabernet Franc, Malbec and Petit Verdot act as the supporting cast. These three grapes help to add color, structure and body in varying amounts. A Bordeaux blend typically, but not exclusively, uses at least three of the five grapes to be labeled as such. The beauty of the blend? Each year the percentage of each grape in the blend can vary and the winemaker can include more of the variety that excelled in that particular vintage.

Red Grapes

in Bordeaux: Merlot (50% of Bordeaux vineyards)

Cabernet Sauvignon (26%)

Cabernet Franc (10%)

Other red grapes in Bordeaux, very occasionally: Petit Verdot - Malbec - Carmenère

No matter where they are from, almost all red Bordeaux is blended wine: made from two or more grapes. Red wine grape varieties allowed in Bordeaux, in order of importance, are

Cabernet Sauvignon, Merlot, Cabernet Franc, Malbec and Petit Verdot.

Bordeaux also produces considerable quantities of white wine. Grape varieties permitted are: Sauvignon Blanc and Muscadelle.

The five you are thinking of are:-

Cabernet Sauvignon

Cabernet Franc

Malbec

Merlot

Petit Verdot

The Appellation Controllee rules also allow Carmenere, a historic Bordeaux which had virtually died out there.

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RE:

what are the five grape varieties allowed in a red Bordeaux?

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the five grape varieties of red bordeaux are: cabernet sauvignon merlot cabernet franc petit verdot malbec

Bordeaux Varietals

i believe they are: Cabernet Sauvignon, Merlot, Pinot Noir, Shiraz, & Syrrah