The fruit is a false berry 5-16 mm in diameter, with a flared "crown" at the end; they are a pale green at first, then red-purple and finally indigo when ripe. Baked they have a sweet taste, with variable acidity.
Blueberries are sold fresh or processed, quick-frozen individual fruit (IQF), puree, juice or dried - to be used in a variety of consumer goods, such as jellies, jams, pies, muffins, snacks and cereals. .
To freeze freshly picked blueberries, place them in a single layer on a baking sheet in the freezer. It is best to rinse before use, but not before freezing.