Kale is extremely good for our bones. Its high content of calcium is important for bone formation. In the garden, kale tolerates neighboring tomatoes, runner beans, spinach, celery, rhubarb, radishes, lettuce, leeks, cucumbers and peas. Kale is harvested when the first frosts have come. Kale can be used for soups, purees, or side dishes. It can be blanched, steamed or rolled.