- Niagara is a seedless, white-fruited descendent of the ‘Concord’ grape. It is the leading green grape grown in the U. S. today and the grape most commonly used for production of white grape juice in North America. It is the result of a cross made between ‘Concord’ and ‘Cassady’ grapes in 1868 in Lockport, New York by C. L Hoag and B. W. Clark. It was first commercially sold in 1882. Panicles of fragrant, greenish flowers in spring are followed by clusters of white seedless grapes which ripen in midseason Plants are vigorous, hardy, and productive. Considered to be a good grape for sweet white wines, fresh table grapes, jams, juices or jellies.