The word Véraison is a French word adopted into the world of viticulture, whose literal translation means “towards ripening”. Véraison is the time at which the berries begin to change from growth to ripening.
With red wine grapes, this is most easily recognised by the change in colour from green slowly in stages through to red. As Véraison starts, berry growth begins to slow, acidity in the grape starts to reduce and sugar levels rise. This process continues until the grapes are ready to harvest.
It is not yet known what causes the process of Véraison to begin.