What is a cover crop and why use one?
A cover crop is a plant grown mainly to benefit the soil instead of to sell. Cover crops can reduce erosion, add organic matter, suppress weeds and feed soil life, among other benefits, though results depend on species, timing and management.
The Natural Resources Conservation Service and SARE publish research and farmer experience on cover crops, and your local extension office can explain what works in your area.
Start with a clear goal, since the goal drives every other choice.
When should you seed?
Timing is the most important and the most local decision. Seeding too late means poor establishment before winter, and seeding too early may cause problems with some species. Ask extension about the right window for your area and the species you plan to use.
Weather matters. Seed ahead of rain if you can, and avoid seeding into very dry or waterlogged soil.
Plan around your harvest, because the crop that came off before may decide what you can seed. If you are unsure about a species, ask for a sample plan from extension or a neighbor and adapt it.
- Set a goal for the cover crop
- Ask extension for local timing
- Seed before reliable rain
- Fit seeding around harvest
How do you choose species?
Different species do different jobs. Some grow quickly, some survive winter, some feed soil with nitrogen and some break up compacted ground. Choose based on your goal, climate and the next crop, and consider mixes only after learning what each species does.
Ask extension or your conservation district which species are proven locally. Buy seed from reliable sources and check the tag for variety, germination and weed content.
Do not assume what works in another state will work in yours.
How do you prepare the seedbed?
Good seed-to-soil contact matters. Depending on equipment, this may mean light tillage, broadcasting and raking, drilling or no-till seeding. Follow seeding depth and rate recommendations for the species.
Remove or manage heavy residue that blocks seed, and fix compaction problems if they are severe. Avoid working wet soil.
Cover crops are not a cure-all. They add work and cost, and they work best as part of a plan that includes rotation, good drainage and attention to soil conditions. Water also matters. If fall is dry, seeding may need rain to establish, so watch the forecast and seed accordingly. Avoid seeding right before a heavy storm that could wash seed away.
- Check seed tags
- Follow recommended rates and depths
- Ensure good soil contact
- Avoid working wet soil
What happens in spring?
Plan how you will end the cover crop before planting your next crop. Methods include mowing, rolling, tillage or grazing, and the right method depends on species and stage. Terminating at the wrong time can cause problems for the next crop.
Ask extension about timing for your species and about any herbicide use, which must follow label directions and local rules.
If you plan to graze the cover crop, ask your veterinarian or extension specialist about any risks for your species, since some plants can cause health problems for animals.
Are there programs that can help?
Some conservation programs may provide technical or financial help for conservation practices, including cover crops. Eligibility, sign-up dates and payments are set by the agencies. Contact your local NRCS or FSA service center and ask directly.
Do not make financial commitments based on a rumor. Confirm details with the agency.
Keep notes on costs, seed sources and results, which help if you apply for any assistance and help you judge whether the practice is paying off on your farm. Ask what documentation they need so you can keep the right records.
How do you start small?
If you are new, try a small area first and observe. Note seeding date, species, weather and results. Over a few seasons you will learn what works on your land.
Talk to neighbors who use cover crops. Local experience is often the fastest way to learn.
Walk the field after a few weeks and look at stand, color and weeds. Take photos, which are a useful record and help advisors give advice. Be patient. Benefits often build over several seasons.
Key takeaways
- Cover crops serve the soil, and a clear goal drives choices.
- Timing is the most local decision, so ask extension.
- Choose species for your goal, climate and next crop.
- Plan termination before you seed.
- Check with NRCS or FSA about help, and start small.
Sources and further reading
Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.