The red variety is a new breed between Blaufränkisch x St. Laurent. The crossing was made in 1922 by Dr. Fritz Fritz Zweigelt (1888-1964) at the Institute of Viticulture in Klosterneuburg (Austria). Synonyms are Blue Zweigeltrebe, Blauer Zweigelt, Cvaigelt, Cveigelt, Klosterneuburg 71, Rotburger, Zweigelt 71, and Zweigeltrebe Zwiegelt. The first name used by breeders Rotburger prevailed not. Later she received after her creator&...You see a shortened form of description. The full description is reserved for our subscribers.