Managed by its fourth generation of winemakers, Domaine de Sacy is located in a tiny hamlet near Crézancy and Bue. Vines average 30 years, with some 45 years and one parcel 65 years old. Owner Karine Millet has just recently taken over the family domaine from her mother, which includes seven and a half hectares of vineyards. The domaine is presently in conversion to certified organic and practices sustainable viticulture without herbicides or pesticides. Domaine de Sacy also practices polyculture, the historical practice in Sancerre. A cattle farm and a grain farm are found on the estate, which allows the soil of the vineyard to be fed with manure transformed into compost. Harvest is done both by hand and mechanically.

The flinty, clay-limestone, or white soil of the Sancerre vineyard is locally called "Grosse terre" (heavy soil) because it is difficult to work after rain due to its high clay content. This somewhat heavy soil is studded with white stones; the clay provides freshness by releasing water gradually and consistently, while the Kimmeridgian limestone, with its filtering properties, allows the vines to draw water from deep within the soil, thus contributing to the water balance. This results in rich and complex wines, combining the powerful aromas imparted by the clay with the minerality of the limestone