Collard-Greffier is a 13.5-hectare family estate managed by Magali Greffier alongside her brother and father, with vineyards divided between Congy in the Coteaux du Petit Morin and the Côte de Bar in the Aube. The two zones offer contrasting geological profiles: Congy sits on argilo-calcareous soils rich in black silex — a rare flint type characteristic of the Petit Morin valley that contributes mineral tension and a faintly smoky quality to the wines — while the Aube parcels are planted on Kimmeridgian marl and limestone, a soil type shared with Chablis, producing fuller-framed, fruit-driven Pinot Noir.

The estate's plantings are Pinot Noir-dominant at around 67%, complemented by Meunier and Chardonnay. Farming follows a reasoned viticulture approach: organic products only, no chemical treatments, attention to soil biology. A substantial portion of the harvest is sold to négociants annually, with the estate retaining its best fruit for its own range — a selection that varies between 30,000 and 60,000 bottles depending on the vintage. In the cellar, Magali works with a non-interventionist philosophy: minimal additions, no unnecessary handling, and a focus on letting fruit and terroir carry the wines.

The Brut Nature cuvée — zero dosage — is the clearest expression of this approach, relying entirely on the natural balance of the fruit rather than correction at disgorgement.