Structured, well-balanced wines require the production of healthy, concentrated grapes. At Couhins the ideal yield is around one kilo of grapes per two square meters of leaf area. This is adjusted depending on grape variety and soil characteristics. The control of yields involves numerous operations. First, there is pruning which, if carried out systematically, enables an approximate determination of the yield. Adjustments are then made with a series of operations that favour the ripening process (removal of non-fruiting buds, removal of excess growth at the base of the vines, and the removal of unwanted shoots).

Leaf removal is moderate, so as not to expose the bunches to the rays of the setting sun that could burn the grapes. The removal of green grapes provides a final means of controlling the yields. The main value of this last procedure is to ensure well-spaced, regular distribution of the bunches on the vines.