Understanding Bordeaux Varietals

Bordeaux is built on blends. While most New World wine regions market individual grape varieties, Bordeaux has always treated blending as an art form, combining grapes with complementary strengths to produce wines more balanced and complex than any single variety could achieve alone. The six permitted red grapes each contribute something specific, and understanding what each does in a blend is the fastest way to make sense of both Bordeaux itself and the many Bordeaux-inspired wines made in California and elsewhere.

The Six Red Grapes

Cabernet Sauvignon is the dominant grape of the Left Bank, where it accounts for 60 to 90 percent of most blends. It brings dark fruit (blackcurrant, black cherry), firm tannins, and the structural backbone that allows top Bordeaux to age for decades. Young Cabernet Sauvignon tastes of cassis and graphite. With fifteen or twenty years in bottle, those flavours develop into tobacco, cedar, and leather. It needs warmth and good drainage to ripen fully, which is why the gravelly soils of Pauillac, Saint-Julien, and Margaux suit it so well. A good Cru Bourgeois from the Haut-Medoc, such as Chateau Sociando-Mallet, demonstrates what well-made Left Bank Cabernet looks like at $30 to $45.

Merlot is the most widely planted grape in Bordeaux and the foundation of Right Bank wines from Pomerol and Saint-Emilion. It ripens earlier than Cabernet Sauvignon, produces softer tannins, and delivers plum, cherry, and red fruit with a rounder, more immediately appealing texture. In blends, Merlot fills the mid-palate where Cabernet can feel hollow, adding richness and making the wine approachable at a younger age. On the Right Bank, where clay and limestone soils favour it, Merlot produces wines of real concentration and depth. Chateau Jean Faure in Saint-Emilion Grand Cru, a Merlot and Cabernet Franc blend, shows the plush texture and mineral complexity of good Right Bank wine at around $40 to $55.

Cabernet Franc is genetically a parent of Cabernet Sauvignon and contributes what neither Cabernet Sauvignon nor Merlot can provide on their own: aromatic lift. It smells of raspberry, violet, and fresh herbs, and it has a silky, fine-grained tannin structure that adds elegance rather than weight. On the Right Bank, Cabernet Franc is frequently the second grape in the blend and occasionally the lead. Chateau Cheval Blanc, one of the most celebrated wines in Bordeaux, is roughly equal parts Cabernet Franc and Merlot. In the Loire Valley, where it is vinified as a single variety, Cabernet Franc from Chinon or Bourgueil demonstrates its character in pure form for $15 to $30.

Petit Verdot is used in small proportions, rarely exceeding five percent of a blend, but its effect is disproportionate. It adds deep colour, firm tannins, and dark spice notes (liquorice, black pepper) that give a blend additional structure and intensity. It ripens very late and needs warm vintages to reach full maturity, so it functions as a seasoning rather than a base ingredient. In warm years it is magnificent; in cool years it is often left out of the blend entirely.

Malbec was historically important in Bordeaux but is now used sparingly there. It produces deeply coloured wines with plush, dark fruit and moderate tannins. The grape found its second life in Cahors (southwest France) and then in Mendoza (Argentina), where it became the country's signature red. In a Bordeaux blend, Malbec adds richness and mid-palate weight.

Carmenere nearly disappeared from Bordeaux after phylloxera but was rediscovered in Chile in the 1990s, where it had been misidentified as Merlot for decades. It produces full-bodied, dark, spicy wines and appears occasionally in California Bordeaux-style blends, though it remains rare in Bordeaux itself.

Left Bank and Right Bank

The Gironde estuary and its tributaries divide Bordeaux into two fundamentally different winemaking zones. The Left Bank (Medoc, Graves, Pessac-Leognan) has deep gravel soils over limestone that drain well and retain heat. Cabernet Sauvignon thrives here and typically makes up 70 to 90 percent of the blend. The resulting wines are structured and tannic when young, built to age, and at their best after ten to twenty years in bottle. The famous classified growths of 1855 are almost exclusively Left Bank properties.

The Right Bank (Pomerol, Saint-Emilion, Fronsac, Cotes de Castillon) has heavier clay and limestone soils and a slightly cooler microclimate. Merlot and Cabernet Franc are the dominant grapes. Right Bank wines tend to be rounder, more approachable young, and built around fruit and texture rather than tannic structure. That said, the best Right Bank wines age as long as their Left Bank counterparts. Chateau Petrus, made almost entirely from Merlot on a plateau of blue clay in Pomerol, is among the most expensive and long-lived wines in the world.

For buyers exploring Bordeaux, the Right Bank generally offers better value at the entry level. Appellations like Cotes de Castillon and Fronsac produce serious Merlot-based wines at $15 to $30. On the Left Bank, the Cru Bourgeois classification in the Haut-Medoc is a reliable indicator of quality at $20 to $45.

Why Blend at All

The logic of Bordeaux blending is partly about flavour and partly about risk management. Different grapes ripen at different times. Merlot and Cabernet Franc come in first, Cabernet Sauvignon later, and Petit Verdot last of all. In a cool vintage, the early-ripening varieties may produce better fruit than the late-ripening ones, and the winemaker adjusts the blend accordingly. In a warm vintage, Cabernet Sauvignon ripens fully and takes a larger share. Each vintage produces a different blend, even from the same estate.

The flavour argument is equally practical. Cabernet Sauvignon provides structure and ageing potential but can be austere on its own. Merlot provides flesh and fruit but can lack backbone. Cabernet Franc adds aroma and finesse. Petit Verdot adds colour and spice. No single grape achieves the balance of all four together. The winemaker's skill lies in judging the proportions each year.

Bordeaux Grapes in California

California grows all the major Bordeaux varieties, and Cabernet Sauvignon is the state's most prestigious red grape. Napa Valley in particular has built its reputation on Cabernet Sauvignon, and the best Napa Cabs rival top Bordeaux, though they tend to be riper, more fruit-forward, and ready to drink younger. Single-varietal Napa Cabernet typically costs $50 to $150 from well-regarded estates, with top names commanding considerably more.

Outside Napa, several California regions produce excellent Bordeaux-style blends at more accessible prices. Happy Canyon in Santa Barbara County has the warm days and cool nights that suit Cabernet Sauvignon and Merlot. Paso Robles on the Central Coast grows all six Bordeaux varieties and produces blends with generous fruit and moderate tannins at $25 to $60. These regions are worth watching for anyone who enjoys the Bordeaux blend style but finds Napa pricing prohibitive.

Food Pairing

Bordeaux blends are natural partners for red meat. Left Bank wines with their firm tannins work well with grilled steak, roasted lamb, and rich braises. Right Bank wines, being softer and rounder, pair comfortably with roast chicken, duck confit, pork loin, and mushroom-based dishes. The tannins in Bordeaux cut through fat, which is why aged hard cheeses (Comte, aged Cheddar, Manchego) and charcuterie work as well as they do.

We carry Bordeaux and Bordeaux-style California blends from producers focused on quality over volume. Browse the current selection at arrowsmithwine.com or email us at info@arrowsmithwine.com.

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