Courbu

The Story

Courbu has been holding up Pyrenean wine blends since the monks of Roncesvalles planted vineyards along the Camino de Santiago in the 11th century. That's over a thousand years of uninterrupted winemaking history in the rugged foothills where France gives way to Basque Country. The grape's Basque name — Hondarrabi Zuri, meaning "white from Hondarribia" — tells you everything about how deeply embedded it is in the culture. Romans were already noting wine production here in the 3rd century; Courbu just became the local workhorse that glued it all together.

The name "Courbu" means "curved" in the local dialect, a reference to the gentle convex arc the grape clusters form as they ripen. It ripens early — around the same time as the red varieties — which means harvesters are juggling reds and whites simultaneously in September. By November, the Petit and Gros Manseng are still hanging on the vine concentrating sugars, and little Courbu has been in barrel for months.

In Jurançon, Courbu plays the freshness role in luscious sweet blends, slicing through the honeyed weight of late-harvest Manseng with its vibrant citrus and acidity. Cross the mountains into Irouléguy and the same grape becomes the backbone of bone-dry whites that pair with fresh Ossau-Iraty sheep's cheese and grilled Bayonne ham. Barely 200 hectares of Irouléguy exist in total — one of France's smallest AOPs — and Courbu is the white grape that defines its character. By the 1980s, it nearly disappeared when Sauvignon Blanc swept the region. A handful of young winemakers brought it back. That rescue now looks prescient.

Insider Story

Courbu and its near-twin Petit Courbu are so genetically similar they were only separated by ampelographers noticing a slight darkening in leaf color after budding — that's how close they are. The Basques meanwhile had already figured this out independently: they call Courbu Blanc "Hondarrabi Zuri" and Petit Courbu "Hondarrabi Zuri Zerratia" (meaning "the tight-bunched one"). Two names for what is essentially the same grape expressing itself in two slightly different ways. The French and Spanish traditions evolved in parallel on either side of the Pyrenees without knowing they were cultivating the same variety. When DNA research caught up, everyone shrugged — the Basques had been right all along. There's also a fascinating footnote: Courbu is believed to be an ancestor of several Txakoli varieties, meaning this humble blending grape may be the genetic root of one of the world's most fashionable natural wine styles.

Technical Deep Dive

Courbu Blanc is a white Vitis vinifera variety with small, tightly packed bunches that ripen relatively early for the region — a full month before Petit Manseng. This early ripening means it tends to be harvested in September alongside red varieties, giving winemakers a logistical puzzle during vintage. The grape produces wines naturally high in acidity with pronounced citrus aromatics (lemon peel, grapefruit) and honeyed floral notes when ripe. In Jurançon AOC and Jurançon Sec AOC, Courbu is a permitted blending variety but must remain a minor component (less than 50%) — the appellation's backbone is always Gros and Petit Manseng. In Pacherenc du Vic-Bilh AOC, similar rules apply, where Courbu is blended with Arrufiac and the Mansengs. In Irouléguy AOC, Courbu (often listed as Petit Courbu) forms up to 50% of white blends, paired with Gros Manseng. Importantly, neither Courbu variety is permitted in Jurançon Vendanges Tardives — that category is strictly Manseng-only. The vine is susceptible to coulure (poor fruit set) in cold springs, which makes yields unpredictable in the Atlantic-influenced Pyrenean climate. Biodynamic producers like Domaine Arretxea manage this through careful canopy work and organic viticulture.

Industry Secrets

The dirty secret of Irouléguy is that the Cave Irouléguy cooperative vinifies the majority of production, so most bottles labeled "Irouléguy Blanc" are cooperative wines. The grower-estates — Arretxea, Brana, Ilarria — represent tiny volumes but outperform the cooperative dramatically in quality. Domaine Arretxea's "Hegoxuri" (Basque for "white sky") is a certified biodynamic blend of roughly 55% Gros Manseng, 25% Petit Manseng, 20% Petit Courbu, and it is one of the most underpriced great white wines in France. Kermit Lynch in the US charges under $40 for a wine that drinks at Burgundy premier cru level. The reason it's not famous is simple: total production of Irouléguy blanc is a few thousand cases per year. There's no volume to build a global reputation. Domaine Brana's "Ilori" is 50/50 Petit Courbu and Gros Manseng and retails under $25 in most markets — arguably the best QPR white wine in South West France that nobody talks about.

More red grapes

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