Niagara grapes are a variety of the North American grape species Vitis labrusca and are used as table grapes and for wines, as well as jams and juice. Niagara is the leading green grape grown in the United States. The Niagara grape was created in 1868 when C.L. Hoag and B.W. Clark cross-bred Concord grapes with white Cassady grapes. It was first sold commercially in 1882.
Niagara grapes are considered to be poor shipping grapes, and so are usually only found near where they are grown. They are most commonly found in the United States in New York, Pennsylvania, Michigan, Washington, and Ohio, and are also grown in Canada, Brazil, and New Zealand.
The fresh grape is large and juicy, round to oval-shaped, pale greenish-white in color and has a sweet, very pleasant aroma. It also has a sweet and generally pleasant flavor, sometime being described as "foxy".
One reviewer attempted to characterize the "foxy" description. In analyzing the Niagara grape, he detected aromas like candied lemon rind, a Riesling-like diesel aroma, flowery jasmine-like notes, and what he called "a high-toned, candied muskiness." This latter descriptor he felt was the primary element of the term "foxy". His opinion of wines made with the grape is that they have unique and interesting properties that are not well-known due to Niagara's reputation as a less-than-optimum wine grape.  (http://www.winelabels.org/artniag.htm)
A diesel aroma in wine, surprisingly, is considered to be a positive attribute, but it can be excessive in wines made with the Niagara grape. One opinion is that Niagara grape skins should not contact the must for too long a time after pressing to avoid an excess of this characteristic.
- Unusual Wines - Niagara Grape Variety (http://www.winelabels.org/artniag.htm)
- Getting to Know Niagara, the Grape (http://www.wineloverspage.com/community/paulbulas/getting-to-know-niagara.htm)