The Concord, however -- even its hybrids -- rarely contain the high amount of natural sugar that pure Vinifera varieties contain. They also contain more pectin and acid, and their wines may exude a musky aroma disagreeable to some. For these reasons their juice is always reinforced with added sugar, almost always diluted with water to balance the acid, treated with pectic enzyme to ensure that it clears, and may be flavored slightly with certain aromatic herbs or spices to counter the natural muskiness.




