[2][5][6] Another cultivar, called Cynthiana, closely resembles Norton, but has traditionally been considered a separate variety.

Vineyards were pulled up and Concord grapes were planted in their place, for juice and jam.

In the 21st century, United States wineries along the east coast and throughout the Midwest are re-cultivating and producing wines from Norton grapes, such as at Chrysalis Vineyards in Middleburg, Virginia, which has 69 acres (28 ha) of Norton grapes.

[8] Anthocyanins are the largest group of water-soluble pigments in the plant kingdom and belong to the family of compounds known as polyphenols.

Major sources of anthocyanins are blueberries, cherries, raspberries, strawberries, blackcurrants, purple grapes, and red wine.