How to select for best flavor:
Blueberries are often sold in pint or quart boxes. Always check the box for juice stains, indicating overripe, watery or moldy berries. Also look down into the box and make sure that the berries are all of good quality. Good berries will be plump and deep blue to dark purple in color. They should not be shriveled at all, nor show any splitting.
Peak of the season:
Blueberries are available in good quantity between May and September, but the very best time is from the end of July through August. Washington and Oregon supply most of the blueberries for the West Coast. They are also produced in New Jersey, Michigan, Maine and North Carolina. Canadian blueberries come in late in August and into September. In October, there are sometimes Polish blueberries available.
Like most dark-colored fruit, blueberries are a pretty good source of vitamin A, vitamin C and potassium . They are low in calories and fat and like most fruits have no cholesterol. In addition, blueberries contain neomyrtillin, a substance used in treating diabetes. Neomyrtillin works like insulin to break down excess sugar in the blood. Blueberries are also an excellent source of fiber.
Blueberries are one of the most widely distributed fruits in the colder regions of the earth. They grow wild all over Russia and Northern Europe, as well as in both North and South America. Because of their high vitamin C and A content, they are very important to the diet of the Innuit in the Arctic Regions.