Bordeaux-Style Reds — Cabernet Sauvignon and Merlot
Left Bank vs Right Bank, grape blends, and how climate shapes Bordeaux-style red wine
Learning Objectives
- Describe the key characteristics of Cabernet Sauvignon and Merlot
- Explain why the Médoc (Left Bank) is dominated by Cabernet Sauvignon
- Explain why the Right Bank (Pomerol, Saint-Émilion) favours Merlot
- Identify where Bordeaux-style blends are produced in the New World
The Bordeaux Blend
Bordeaux is one of the world's most famous wine regions, and its red wines are almost always blends. The dominant grape varies by sub-region and style, but the classic varieties are Cabernet Sauvignon, Merlot, Cabernet Franc, Petit Verdot, and Malbec. The art of assemblage (blending) in Bordeaux allows winemakers to compensate for the strengths and weaknesses of each grape in a given vintage, producing more consistent and complex wines than a single variety could achieve alone.
Left Bank — Cabernet Sauvignon Dominant
The Left Bank of the Gironde estuary (Médoc, Graves) is characterised by gravel soils that drain well and warm quickly. These soils suit the thick-skinned, late-ripening Cabernet Sauvignon, which needs warmth and good drainage to ripen fully. Left Bank reds are structured, tannic, and long-lived, with flavours of blackcurrant, cedar, cigar box, and graphite. The Médoc contains the greatest concentration of classified châteaux, including Château Margaux, Château Latour, and Château Mouton Rothschild.
Right Bank — Merlot Dominant
The Right Bank (Saint-Émilion, Pomerol) has more clay in its soils, which retains moisture. Clay suits Merlot, which ripens earlier than Cabernet Sauvignon and thrives in cooler, moister conditions. Right Bank reds are generally softer in tannin, rounder, and more plummy than Left Bank wines — with flavours of ripe plum, chocolate, bay leaf, and mocha. Pomerol's famous clay-limestone plateau produces Pétrus, made from almost 100% Merlot and often considered one of the world's greatest wines.
Bordeaux-Style Reds in the New World
The Bordeaux blend has been adopted globally. Napa Valley, California produces some of the most acclaimed Cabernet Sauvignon-dominant wines outside Bordeaux. Coonawarra, South Australia, with its Terra Rossa soils over limestone, produces structured Cabernet Sauvignon. Chile's Maipo Valley is known for powerful Cabernet Sauvignon. Washington State produces both Cabernet Sauvignon and Merlot of notable quality. In many New World regions, the warmer climate produces riper, more immediately approachable wines than Bordeaux, though the best examples rival the classics for complexity and longevity.
Key Vocabulary
Exam Question Examples
Why does the Médoc produce Cabernet Sauvignon-dominant wines while Pomerol produces Merlot-dominant wines?
Approach
Soils: Médoc's gravel warms quickly and drains well, suiting late-ripening Cabernet Sauvignon; Pomerol's clay retains moisture and suits earlier-ripening Merlot. Result: Médoc wines are structured and tannic; Pomerol wines are richer and rounder. This is a classic example of how soil type determines which grape variety dominates.
What are the advantages of blending different grape varieties in Bordeaux?
Approach
Mention: consistency across vintages (if Cab Sauv struggles to ripen, Merlot can compensate), complexity (different varieties add different flavour dimensions), and risk management (different grapes ripen at different times, so the whole harvest is unlikely to be compromised at once). Also mention that Cabernet Franc adds aromatic lift and Petit Verdot adds colour and spice.
Quick Summary
- 1.Bordeaux reds are almost always blends of Cabernet Sauvignon, Merlot, and Cabernet Franc
- 2.Left Bank (Médoc/Graves): gravel soils, Cabernet Sauvignon dominant, structured and tannic
- 3.Right Bank (Pomerol/Saint-Émilion): clay soils, Merlot dominant, rounder and plummy
- 4.Assemblage allows winemakers to balance the blend for consistency and complexity
- 5.Bordeaux blends are produced worldwide — Napa, Coonawarra, Maipo, Washington State
Practice questions on this topic
Frequently Asked Questions
- What is the 1855 Bordeaux Classification?
- The 1855 Classification ranked the red wines of the Médoc (and Sauternes) into five tiers of "cru classé" based on reputation and price at the time. The top tier is Premier Grand Cru Classé, which in the Médoc includes Châteaux Latour, Lafite Rothschild, Margaux, Mouton Rothschild, and Haut-Brion. The classification has remained largely unchanged since 1855.
- Is Merlot inferior to Cabernet Sauvignon?
- No. The perception of Merlot as inferior comes largely from mass-produced, dilute examples. At its best — as in Pomerol (Pétrus) or Saint-Émilion (Cheval Blanc) — Merlot produces some of the world's most sought-after and expensive wines. The grape's rounder, earlier-ripening character simply makes it less tannic and more approachable young than Cabernet Sauvignon.
Consolidate your knowledge
Use Vinlecta to practise exam-style questions on bordeaux-style reds — cabernet sauvignon and merlot and related topics under timed conditions.
Related study guides: