The Latitude cuvée comes exclusively from parcels located in southern Vertus, in the Côte des Blancs, sharing the same geographic latitude. This southern exposure confers a distinct sunny character. The soils, deeper and more clay-rich than in the northern part of the commune, historically planted to Pinot Noir, bring roundness and breadth to Chardonnay. The Campanian chalk subsoil, signature of the region, ensures the mineral tension and characteristic salinity. The vines, with an average age of 35 years, come from massal selections preserved by the Larmandier and Bernier families.

Pierre and Sophie Larmandier, joined by their son Arthur, manage the estate in certified biodynamics since 1999 (organic certification in 2003). The 16 to 18-hectare vineyard is ploughed to preserve soil life. Harvesting is manual, followed by gentle pressing and light settling. The juices are transferred directly into large-format Stockinger casks and foudres. Alcoholic fermentation begins spontaneously with indigenous yeasts, followed by complete malolactic fermentation. Ageing takes place on lees for 11 to 12 months, without filtration or fining. The second fermentation in bottle is followed by at least two additional years of ageing. Manual disgorgement takes place six months before release. Dosage: 2 to 4 g/l depending on disgorgement.