Which grape variety is commonly blended with Sémillon in white Bordeaux wines?

Sémillon is indeed commonly blended with Sauvignon Blanc in white Bordeaux wines. This blend capitalizes on the strengths of both grape varieties. Sémillon contributes body, richness, and a characteristic waxy texture, while Sauvignon Blanc adds acidity, freshness, and vibrant citrus and herbaceous notes.

The combination of these two grapes allows the winemaker to create a well-balanced wine that showcases the unique terroir of Bordeaux. This harmonious blend often exhibits a range of flavors from ripe fruits to floral and grassy notes, making it popular among wine enthusiasts.

In contrast, the other grape varieties listed—Chardonnay, Chenin Blanc, and Riesling—are not typically found in significant quantities in the white Bordeaux blends. Chardonnay is more prominent in regions such as Burgundy, while Chenin Blanc is better associated with the Loire Valley and Riesling is predominantly linked to regions like Germany and Alsace. Therefore, while these grape varieties have their unique attributes, they are not the primary blending partners for Sémillon in the context of Bordeaux white wines.