Definition - What does Ruby Cabernet mean?
Ruby Cabernet is a grape which was created by crossbreeding Cabernet Sauvignon and Carignan. Wines from this grape are often used more for blending, rather than as single varietal wines.
Crossbreeding of Cabernet Sauvignon and Carignan was done in order to harvest the advantages of each variety; the superior quality of the Cabernet is mixed with Carignan's ability to do well in heat.
Ruby Cabernet was developed first in California and mainly used as a table wine.
WineFrog explains Ruby Cabernet
The Ruby Cabernet variety is a crossbreed that was first developed in 1936 is California, following prohibition, by Dr. Harold Olmo at UC Davis. While the crossbreeding of the Cabernet Sauvignon and Carignan had its advantages in the vineyard, it also had an advantage for the consumers, as it was an inexpensive table wine.
Ruby Cabernet was widely planted in the San Joaquin and Napa Valley regions, and the wines made from it were mainly used to improve bulk wines and balance their acidity.
Wines produced from Ruby Cabernet are to be consumed young and are not intended for aging.