For the team at Pierro, attention to detail in the vineyard is the factor which most clearly determines the success of the Pierro Chardonnay. It is sourced mainly from a north facing block on the south bank of the Willyabrup Brook which flows down the valley to the nearby Indian Ocean. Mike Peterkin believes that this natural watercourse provides a nourishing life-source for the vineyard. The mature vines (25 to 30 years old in 2010) are from high density plantings, 4,000 to 5,500 vines per hectare.