Chateau Petrus

The vineyard of Pétrus covers 11.4 hectares (28 acres) and is located on a plateau in the eastern portion of Pomerol.

Located on top of a 20-hectare (49-acre) island mound, the Pétrus boutonnière or buttonhole, Pétrus' original vineyard possesses topsoil and subsoil high in iron-rich clay that differs from neighbouring vineyards, where the soil is a mixture of gravel-sand or clay-sand.

The estate was among the first in Bordeaux to implement green-harvesting or éclaircissage as a way to lower crop yields and raise the quality of the remaining grapes.