The question of sulphur (SO2) in wine has become essential for many wine lovers, whether they are sensitive to this compound or simply looking for more natural, low-intervention wines. While the option of wine with no added sulphur in Bordeaux exists, many are simply looking for low-sulphite wines, offering an ideal balance between protection and the pure expression of fruit. This is precisely what we strive to offer at Château Cazebonne.

Our philosophy, rooted in organic farming and biodiversity, naturally leads us to target the lowest possible levels of added SO2, well below the thresholds permitted even by organic standards. How do we produce low-sulphite wines in Bordeaux while ensuring their quality and stability?

The Essential Role of Sulphur in Winemaking

Sulphur, or sulphur dioxide (SO2), is a natural element and a fundamental oenological additive used since antiquity for its preservative properties. In wine, its role is twofold and crucial. Firstly, it acts as a powerful antiseptic, inhibiting the development of undesirable microorganisms such as acetic acid bacteria and certain wild yeasts that could spoil the wine. Secondly, it is an excellent antioxidant, protecting the wine from premature oxidation that degrades aromas, colour, and freshness. Without adequate protection, a wine can quickly lose its organoleptic qualities, turn flat, or develop undesirable aromatic faults. Thus, sulphur stabilises the wine, guarantees its longevity, and preserves the expression of its terroir.

The Challenges of Minimal-Sulphur Winemaking

Producing wines with minimal sulphur additions represents a true technical challenge and requires unyielding rigour at every step. Eliminating SO2 entirely is an extreme approach that exposes wine to significant risks of spoilage. Winemaking with minimal sulphur demands complete mastery of the entire process, from vineyard to bottle. Grape sanitary quality is paramount; fruit must be pristine to avoid introducing unwanted microorganisms. Impeccable hygiene in the cellar is essential to prevent contamination. Temperature control during fermentation and ageing, alongside rigorous protection against oxygen, are equally crucial in preventing oxidation. It is a delicate balance between protection and natural expression.

Our Approach to Low-Sulphite Wines

Unwavering Rigour, from Vine to Bottle

• Grape Health and Quality: Everything begins in the vineyard. Perfectly sound grapes, farmed with respect for the land and harvested at optimal ripeness, inherently require less protection.
• Rigorous Cellar Hygiene: Impeccable cleanliness substantially limits the risk of unwanted microorganisms developing, reducing the need for antiseptic SO2.
• Precise Vinification: Careful monitoring of fermentations (driven by our indigenous yeasts, naturally present on the grapes) and key steps such as racking allows us to add sulphur only when strictly necessary and at minimal doses.
• Protection against Oxidation: We employ gentle, innovative techniques to minimise the wine's contact with oxygen during ageing and bottling, thus preserving its freshness.
• Choice of Sulphur: We exclusively use pure volcanic sulphur, renowned for its efficacy at low doses.

At Château Cazebonne, our commitment is to vinify our wines with as few sulphites as possible. However, to guarantee stability and sound conservation once bottled, we choose to add a tiny dose of sulphur just before bottling. This essential step, carried out with discernment, ensures our wines maintain all their aromatic and structural qualities, travelling safely to your table without risk of spoilage. This is the balance we have chosen: combining naturality and reliability while avoiding the pitfalls of a completely unprotected, zero-sulphur approach.

The Benefits of Cazebonne Low-Sulphite Wines

Why Choose Low-Sulphite Wines from Cazebonne?

Beyond our ethical commitment, choosing a low-sulphite wine from Cazebonne means choosing:

• Digestibility and Well-being: Lower doses of SO2 are often better tolerated by sensitive individuals, contributing to a more enjoyable tasting experience.
• Authentic Fruit and Terroir Expression: Less sulphur allows the grape’s primary aromas and the subtle nuances of our Bordeaux terroir to express themselves more freely, yielding vibrant, complex, and expressive wines. This guarantees a wine with less "make-up", closer to its true nature and varietal identity.
• A Commitment to Biodiversity and History: Our low-intervention approach is particularly meaningful for our cuvées crafted from forgotten grape varieties. As Jean-Baptiste Duquesne explains in his book "Bordeaux, une histoire de cépages" (Éditions BBD), numerous varieties have vanished from the Bordeaux viticultural landscape. By reducing sulphites, we seek to reveal the authentic character of these ancestral grape varieties we are dedicated to reviving.

Our commitment to low-sulphite wines responds to a clear consumer demand for greater naturality and transparency. It is a demanding approach, made possible by meticulous work in the vineyard and cellar, and the steadfast support of the many wine lovers who have embraced our wines and support our project to replant Bordeaux's lost grape varieties.

The History of Sulphur in Bordeaux Wine

The use of sulphur for wine preservation is not a recent practice. It dates back to antiquity, though scientific understanding and modern applications have developed more recently. Traditionally, sulphur was used for its antiseptic and antioxidant properties, essential for stabilising wine and protecting it against spoilage. In Bordeaux as elsewhere, its usage has undergone various evolutions. Originally, rudimentary methods such as burning sulphur matches in barrels were common. Over the centuries, with advances in oenological knowledge, techniques were refined, allowing for more precise dosage control.

In his book "Bordeaux, une histoire de cépages", Jean-Baptiste Duquesne indirectly highlights the importance of wine preservation throughout the ages, especially for trade and transport. Bordeaux wines, often destined to travel long distances, required effective protection. While the book does not explicitly detail the history of sulphur, it sheds light on the winemaking and preservation challenges that shaped vineyard practices. The quest for a more natural expression of terroir, paired with the protection of these "ancient" or "forgotten" grape varieties, aligns perfectly with reducing inputs. Discover our overall approach to low-intervention winemaking and our vision for Graves sans intrants : l’approche de Cazebonne.

This in-depth work, focused on replanting Bordeaux's lost grape varieties and crafting low-sulphite wines, is made possible thanks to our team's dedication and the trust of all the wine lovers who enjoy our cuvées. To deepen your knowledge of the fascinating history of Bordeaux grape varieties and understand the importance of our philosophy, we invite you to receive the digital edition of the book "Bordeaux, une histoire de cépages", published by Éditions BBD and written by Jean-Baptiste Duquesne. You can also test your knowledge of Bordeaux wines with our wine quizzes, or discover our low-sulphite cuvées directly in our online boutique.