When Is A Blueberry Ripe Blueberry fruit are born in clusters and not all the fruit ripens at the same time. A cluster may have ripe fruit, unripe fruit and green fruit.
Blueberries begin to turn color before they are fully ripe.
An unripe berry will not ripen up further after harvest. Also, unripe fruit will be high in acids, low in sugar and will lack the aromatic blueberry flavor.