In North America, the most common grape juice is purple and made from Concord grapes, while white grape juice is commonly made from Niagara grapes, both of which are varieties of native American grapes, a different species from European wine grapes.
Concord grapes, grape juice and red wine may also help maintain grey matter as you age. That means an improvement in cognitive function and a reduced risk for declines in memory, due to the beneficial cardiovascular and anti-inflammatory properties, according to laboratory...
Seasons/Availability. Concord grapes are available in the late summer through fall, typically between September and late October in the Northern Hemisphere. Current Facts. Concord grapes, botanically classified as Vitis labrusca, are an American variety belonging to the Vitaceae family.

About Concord Grapes.Make your own Concord grape juice by removing the stems, washing the grapes and then putting them into a pot. Crush the fruit and add boiling water to cover the pulp. Simmer for approximately 10 minutes until the skin is soft.
One cup of Concord grapes contains about 62 calories, 0 grams of fat or cholesterol, a mere 2 milligrams of sodium, about 16 grams of total carbohydrates and 175 milligrams of potassium. For more information on Concord grape nutrition and recipes, visit Concord Grape Association.

Do all Concord grapes have seeds? The skin of a Concord grape is typically dark blue or purple, and often is covered with a glaucous epicuticular wax bloom that can be rubbed off. It is a slip-skin variety, meaning that the skin is easily separated from the fruit.
A common problem that plagues concord grapes is uneven ripening. This is when some (or most) of the berries within a grape cluster ripen unevenly. Some of the berries remain sour, hard and green, while others continue to develop normally.