Blueberries are one of the few commercially grown fruits native to North America. While they were a traditional ingredient in Native American cooking and a part of colonists' diets, blueberries were not widely cultivated for sale until the early 20th century. Today, North America is the world's leading blueberry producer, accounting for nearly 90% of global production. California ranks sixth among states growing the berries for fresh consumption.
To pick the best blueberries, look for berries that are firm. Shake the container (very gently) to see if the berries move freely. If they clump together, it is a sign that they are old or damaged. Blueberries will last for a week when kept covered in a refrigerator or for up to a year if frozen.