zinfandelZinfandel first appeared in the United States in the 1820s when Long Island nursery owner George Gibbs imported several grape vines from the Imperial collection in Vienna. One of the vines was Zinfandel. (The current thinking is that Zinfandel originated in Croatia where it is called Plavac Mali.) In the 1850s, Zinfandel made its way to California.

Source: http://www.beekmanwine.com/factsquotes.htm