(1 Gallon) CONCORD Grape Vine, varies in color from deep blue to purple or almost black, excellent variety for jams and juices. (1 Gallon) CONCORD Grape Vine, varies in color from deep blue to purple or almost black, excellent variety for jams and juices. Used for making preserves, juice, wine, liqueur, and vinegar. Full Sun, The main ingredient in grape juice. Hardy in zone 4-9 Excellent source of vitamin C.