Chambourcin is a French-American interspecific hybrid grape variety used for making wine. Its parentage is uncertain. The hybrid was produced by Joannes Seyve who often used Seibel hybrids produced in the 1860s. The grape has only been available since 1963; it has a good resistance to fungal disease. Chambourcin is considered a very productive grape with crop yields reported ranging from 11.1 tons per hectare to 17.3 tons per hectare. The grape produces a deep-colored and aromatic wine. It can be made into a dry style or one with a moderate residual sugar level. Chambourcin is a teinturier, a grape whose juice is pink or red rather than clear like most red vitis vinifera cultivars.
Cabernet Franc is one of the major black grape varieties worldwide. It is principally grown for blending with Cabernet Sauvignon and Merlot in the Bordeaux style, but can also be vinified alone. Cabernet Franc is lighter than Cabernet Sauvignon, making a bright pale red wine that contributes finesse and lends a peppery perfume to blends with more robust grapes. Depending on the growing region and style of wine, additional aromas can include tobacco, raspberry, bell pepper, cassis, and violets. In general, Cabernet Franc is very like Cabernet Sauvignon, but buds and ripens at least a week earlier. The vine is vigorous and upright, with dark-green, 5-lobed leaves. The winged bunches are elongated and small-medium in size. The berries are quite small and blue-black in color, with thin skins. Cabernet Franc can adapt to a wide variety of vineyard soil types but seems to thrive in sandy, chalk soils, producing heavier, fuller bodied wines there. The grape is highly yield sensitive, with over-cropping producing wines with more green, vegetal notes