The Château Guiteronde is located in an exceptional, sunny region, right in the heart of the Haut-Barsac.
In Barsac, the Sauternes soil on the other strand of the Ciron is rather gritty and typically consists of a chalky limestone composition. The soil of the Château Guiteronde is very similar and consists of a thick chalky foundation in the form of a starfish with a low consistency of chalky limestone and a thick mixture of clay and sand.
At the beginning of autumn, the particularly misty mornings produced by the cold waters of the Ciron are followed by hot sunny afternoons. Only this microclimate is compatible with the magic of botrytization.
This natural process is actually linked to a microscopic mushroom, the Botrytis cinerea, which is the real secret of the wines of the Sauternes region. Harmful to the vineyards in many other wine-growing regions, this very common mushroom can be found in this particular microclimate and can adapt to grains in a very different manner. This “noble decaying” process is what creates a film from the permeable bay and changes it into water, which results in the over-ripe characteristic of the grape that disintegrates and becomes sugar before it crystallizes.