Fall Cover Crop Planting

Why plant a cover crop in fall?

Bare soil is vulnerable. Winter rain, wind and thaw cycles wash away topsoil and nutrients, and weeds quickly claim open ground. A cover crop holds soil in place, feeds soil life and can suppress weeds.

Different cover crops do different jobs. Some add organic matter, some loosen compacted soil with deep roots and some, such as legumes, work with soil bacteria to add nitrogen. Land-grant extension services publish guidance on which species fit which goals.

Even a small kitchen garden benefits. A single bed that would otherwise sit bare through winter is a good place to practice.

• Holds soil and nutrients in place
• Feeds soil life and adds organic matter
• Suppresses winter weeds

How do I choose the right cover crop?

Start with your goal: erosion control, organic matter, weed suppression, nitrogen or compaction relief. Then match the species to your climate, soil, planting window and the crops that will follow. Some cover crops winter-kill and some survive to spring.

Ask your county extension office or NRCS office for a list of species and mixes that work locally. Buy seed from a reputable supplier and read the tag for purity and germination information.

Consider mixes carefully. A mix with several species can serve more than one goal, but may be harder to manage in spring than a single species.

• Name your goal first
• Match species to your climate and timing
• Check whether the crop winter-kills or survives
• Plan what you will plant afterward

When should I plant?

Timing is critical, since most cover crops need time to establish before hard cold. Penn State Extension and other land-grant offices publish recommended planting date ranges tied to regional frost conditions, and your local office can tell you the range for your area.

Plant earlier rather than later when possible. In many places a late planting still helps if you adjust the species, but results will be modest. Do not rely on a calendar date from another region.

Watch the forecast. A stretch of mild, moist weather after sowing helps seed sprout, while a hard freeze right after sowing may stop it.

• Check your local planting date range
• Plant before hard cold arrives
• Choose fast species if the window is short

How do I prepare the bed and sow seed?

Clear finished crops and weeds, loosen the surface lightly and rake smooth. Remove large clumps and debris so seed makes contact with soil.

Broadcast or drill seed evenly, then rake it in or press it lightly so it contacts moist soil. Water if the weather is dry. Follow the supplier's seeding guidance for depth and spacing.

Avoid sowing too thickly. Heavy seeding wastes seed and can crowd seedlings, so follow the supplier's rate, which depends on the species and your method.

• Clear and level the bed
• Sow evenly
• Press seed into soil contact
• Water if dry

What if the soil is dry or planting is late?

Dry fall weather can slow germination, so water if you can and choose fast-establishing species. Penn State and other extension offices have guidance on cover crops in dry falls.

If it is too late for a cover crop, mulch bare beds with straw or shredded leaves as a fallback, which still protects soil over winter.

Ask your NRCS office about programs that may support cover cropping on eligible land, and confirm details and deadlines directly with them.

How do I handle cover crops in spring?

Plan to end the cover crop before it sets seed and before planting your next crop. Methods include mowing, cutting, tarping or incorporating, depending on the species and your tools. Allow time between ending the cover and planting.

Ask your extension office about timing for your species. Some cover crops need weeks to break down before sowing, and some can interfere with seedlings if mishandled. Follow the label if you consider using any herbicide.

• End the cover before it sets seed
• Allow time to break down before planting
• Follow extension guidance for your species

What does a cover crop cost and what do I need to track?

Budget categories include seed, any tools or rentals, your labor and possible irrigation. Costs vary by species and place, so get quotes and compare.

Keep records of species, planting dates, weather and results. Over a few years you will learn which species work best on your soil.

A cover crop is not always free money. Compare cost against the soil benefit you expect, and start small until you see results.

Last reviewed: November 12, 2026. Written by the Homestead & Small Farm Editorial Team. See our editorial policy.