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Fruit set

This is the second stage in the annual vegetative cycle of the vine after flowering (see also BBCH code). The fertilised female ovaries of the flowers develop into berries. In the northern hemisphere, this occurs in the months June to July, in the southern hemisphere from December to January. The amount of berries depends, among other things, on the grape variety. As a rule, about one third (e.g. with Chasselas and Riesling) to a maximum of two thirds (e.g. with Silvaner) of the individual flowers are fertilized. One berry contains up to five (rarely six) grape seeds, which can be used as seeds for breeding new grape varieties by sowing and selection.

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