Chapter 1

Annual Growth Cycle of the Grapevine

Fruit Set

Flowering is almost immediately followed by fruit set, when the fertilized flowers develop into berries with seeds. Ideally flowering is quick and synchronous resulting in an even fruit set with berries ripening all at the same time. During fruit set, “millerandage” and “coulure” are particular feared outcomes that may negatively impact the crop. Yield is inevitably lower than normal when these conditions arise. However, a proportion of coulure and millerandage is not necessarily a bad thing for the quality of the final crop.

Click on the following topics for more information on the annual growth cycle of the grapevine.