Green harvest is the removal of selected unripe grape bunches during the growing season to reduce crop load. It is also called crop thinning or, in French, vendange verte. Growers may use the technique when the vine is carrying more fruit than desired or when bunches are unevenly developed.
Removing some bunches can help balance the amount of fruit with the vine’s leaf area and growing capacity. It may improve airflow around remaining bunches, simplify canopy management and help achieve a more uniform crop. However, the effect on grape ripeness and wine quality depends on timing, vine vigour, water status, variety and site.
Green harvest is commonly carried out after fruit set and before véraison, while berries are still green and unripe. Workers select and remove bunches by hand or with suitable equipment. The grower may target late-developing, shaded or poorly positioned bunches, depending on the vineyard’s objective.
Green harvest is a deliberate human intervention. Coulure, millerandage, frost and other environmental factors can reduce crop size naturally, but they are not green harvest. Removing bunches does not guarantee more concentrated fruit; excessive crop thinning can sometimes encourage excessive vegetative growth or have little effect on final composition.
Example: a grower may remove selected bunches from a vigorous Cabernet Sauvignon block before véraison to bring the crop load into balance with the vine.
Chef’s note: green harvest is a vineyard management decision, not a certification of quality. The outcome depends on vine balance and the conditions of the season.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
