The vineyard stands out for a rare geological mosaic: about 70% of the soils are Portlandian, rich in recent Jurassic limestone, which gives the wines fineness and minerality. The remaining 30% lies on Kimmeridgian soils from the Upper Jurassic era, where clay prevails, adding roundness and volume to the grapes. In the cellar, Bardiau adopts a natural and rigorous approach, with fermentations entrusted to indigenous yeasts and bacteria, without corrective interventions.