Veraison in grapes, what is it?
Grape size
During this phase the size of the grape is set, smaller berries are favoured in order to make high quality wine as there is a better ‘skin to juice’ ratio which combines to give the wine a better structure and concentration of flavor.
Do all grapes ripen together?
Not all grapes bunches ripen at the same time, it could be that some bunches that look like they will not ripen will be removed in order to further aid ripening of all the other bunches.