At the Montelena Estate we have 9 1/2 acres of 30 year old Zinfandel vines, and about the same of 9 year old Primitivo-Zinfandel. For the last several years we used a proprietary name for the Zinfandel blend, "St. Vincent”, since it was pretty much half California-Zinfandel and half Primitivo-Zinfandel. Ahhh, but now we just call it what it is ... good old Zinfandel. Genetic testing has determined, and the ATF has agreed, that Primitivo and Zinfandel are synonymous. The Mighty Montelena Zinfandel is back!