62 days. Enjoy a long season of hearty, fresh greens with this new, bolt-resistant lacinato. Ebony’s compact habit and deeply puckered, thick leaves are a great fit for the late fall and early spring gardens, as the cold-tolerant plants are built for hunkering down under a blanket of snow. At 22 inches tall, they produce a continuous harvest of richly colored, dark slate-blue leaves for soups, stews, salads and more.