Cover crops primarily serve to conserve topsoil, prevent erosion, improve soil structure, increase organic matter, and capture and hold nutrients for the following crop. They also feed the soil microbes and several of them encourage earthworm activity.  Some legume cover crops have the potential to produce a lot of nitrogen that can significantly reduce your fertilizer bill. Typically the crop following a cover crop is a lot more productive than a crop grown without one. The use of cover crops has exploded over the last several years. Demand for cover crop seed is high and seed growers are trying to keep up to increasing demand. We recommend to order early to ensure the cover crops you need will be available when you need them.