Did you ever wonder how difficult it was to graft a vine from one variety to another? Or why that is something that is done? We recently grafted several acres of Petit Verdot over to Cabernet Franc. We are using more Cabernet Franc and actually making two barrels of 100% Cabernet Franc this year! Our vineyard crew had the task to graft these vines.
Here is the process: we took a sliver from the Cabernet Franc vine and attached it to the root stock of the Petit Verdot.