The Frontenac grape is a classic blueish-black variety that ripens in the fall. This cold-hardy wine grape is highly sought after for its use in juices and wines, including rosés, ports, and dry red wines. Self-pollinating and requiring regular pruning, the Frontenac is a heavy producer with excellent resistance to powdery mildew. It thrives when planted in moist, well-draining soil with a sturdy support structure and can also be used as a natural screen along fences.