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.
Cowpea Cover Crop. You should be as concerned about improving soil quality in the greenhouse as in the garden. I grow a cover crop of cowpeas in the off season to improve the soil. Another possibility is the growing of forage cropsâgrain grasses, mixed crucifers, peas, etc.âas cut-and-come-again forage for poultry in the winter. The biomass of the root systems of some of these plants, especially rye, is quite large.