A frenulum (or frenum) is a small fold of tissue that prevents an organ in the body from moving too far.
Cover crops usually are grown to prevent soil loss from wind and water erosion. Use fast-growing cover crops, such as winter wheat or annual rye, on fall-spaded gardens. A second, and probably more important reason home gardeners should use cover crops is to improve soil structure and increase organic matter.
Vegetable grown for their leaves and roots are the best choices for shady gardens. Salad greens such as lettuce, spinach, cabbage, and celery can be grown in shaded gardens. Roots crops such as beets, leeks, potatoes, and turnips can be grown in shady gardens.