Concord grapes are harvested in the fall, usually September-October. Concord grapes are available at some grocery stores during the fall, but most are harvested to make 100% juice, juice drinks, and Concord grape jellies and jams.
Store grapes in a plastic bag or container in the refrigerator for up to 1 week.
Fat free, saturated fat free, very low sodium, cholesterol free, good source of manganese
For more on the growing science behind the Concord grape visit The Grape Science Center.