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.
You can sow cover crop seeds in the fall and turn them under in the spring. You also can plant them in different sections of the home garden early in the spring. This can be done over several growing seasons. This rotation will improve a large vegetable garden over several years.