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.
Five general types of plants are commonly used as groundcovers in gardening: 1  Vines, which are woody plants with slender, spreading stems. 2  Herbaceous plants, or non-woody plants. 3  Shrubs of low-growing, spreading species. 4  Moss of larger, coarser species. 5  Ornamental grasses, especially low-growing varieties.