n order for grapes to be used in the creation of a great rosé champagne, they have to attain perfect maturity, which is sometimes difficult to achieve in the changeable Champagne climate. This is why Louis Roederer decided to invest in the vineyards at Cumières, where the shallow calcareous clay soil, which is on south-facing slopes bathed in the light reflected from the banks of the river Marne, enables the grapes to attain optimum phenolic maturity.