Concannon Vineyard is the second-largest winery in the Livermore Valley of California, producing around 30,000 cases annually.

James planted a large area of his Livermore vineyard solely with the imported vines.

Dr. Olmo, Professor Curt Alley and Jim Concannon prepared a test bed where they could closely monitor specimens of the grapes descended from these wines.

[3] According to UC Davis,[2] Its success in producing and selling sacramental or altar wine for the Roman Catholic Church helped it to survive national Prohibition.

In July 1992, The Wine Group reportedly bought the Concannon operation from Tesla for an undisclosed price.