Which grape variety is known for forming the backbone of Bordeaux's left bank wines?

Cabernet Sauvignon is renowned for forming the backbone of Bordeaux's left bank wines, which are characterized by their structured, full-bodied profile and aging potential. This grape variety thrives in the gravelly soils of the left bank, particularly in prestigious wine regions like Médoc and Graves, where its thick skin and resistance to disease contribute to producing wines with deep color, robust tannins, and complex flavor profiles.

In addition to its prominence in Bordeaux, Cabernet Sauvignon is recognized for its ability to age exceptionally well, allowing it to develop nuanced flavors over time. While Merlot and Cabernet Franc also play significant roles in Bordeaux blends—often used for their softness and aromatic qualities—Cabernet Sauvignon is the dominant variety that typically provides the foundational structure and depth that are hallmarks of left bank wines.

Pinot Grigio is not associated with Bordeaux or its wines, as it is primarily cultivated in regions known for producing lighter, crisper white wines.