Blueberries are best stored cold. The refrigerator will slow down the ripening process therefore prolonging their freshness. You may have noticed a dusty outer coating on blueberries; this is the fruit’s natural preservative called ‘bloom.’ Wait to wash off the natural bloom until right before you eat the fruit will preserve them the longest. Rinsing before storing in the fridge will promote the growth of mold and spoil them quickly. To see how to best store fruits and vegetables, take a look at our storage guide.