8505
Average cost (in U.S. dollars) of a ton of Napa Valley cabernet franc, as of 2018 according to the Napa County Agricultural Crop Report. That makes cabernet franc the most expensive grape variety in the Napa Valley. Cabernet franc’s progeny, cabernet sauvignon, comes in second at an average of $7925 a ton. The number of acres of Napa cabernet franc has remained fairly constant at just over 1,000.