Cover Crops for Wildlife

How can a cover crop help wildlife?

A growing cover crop gives bare ground a living blanket. That blanket supports insects, which feed birds and other animals, and flowering species give pollinators nectar and pollen when little else is blooming.

Standing stems and residue also provide shelter and nesting cover in some situations. Extension guides on pollinators and cover crops describe how the choice of species and timing changes what benefits you get.

On a small farm the benefit often shows up where beds and fields would otherwise sit empty for months. A planted cover turns that empty time into food and shelter for insects and birds, with very little extra work once the habit is established.

• Flowers feed pollinators
• Dense cover shelters insects and small animals
• Residue protects soil through winter

Which plants fit which goal?

Grasses such as cereal grains build soil structure and provide cover, legumes can feed insects when they flower, and brassicas and other broadleaf plants add bloom and diversity. Mixes often outperform single species for variety of benefits.

Pick species suited to your region, your soil and your next crop. Your extension office can tell you which cover crops are recommended locally and which should be avoided because they may become weedy or carry pests.

Do not assume that more kinds of seed is always better. A simple mix of a few well-chosen species, planted at the right time, often does more than a long packet of seeds that struggle in your conditions. Start with what local growers and extension recommend and add from there.

• Grasses for cover and soil structure
• Legumes and broadleaves for bloom
• Mixes for variety of benefits

When should you plant and when should you stop?

Timing depends on your frost dates, soil temperature and when the main crop comes out. Cool-season covers are usually seeded after summer crops finish and need time to establish before cold weather arrives. Warm-season covers go in after the soil has warmed in spring or summer.

Ask your extension office for local seeding windows tied to your average first and last frost, rather than relying on a general calendar date. Seed contact with soil and adequate moisture are more important than perfect timing.

Cold tolerance varies by species. Some covers die in a hard freeze, which can be useful when you want easy spring planting, while others overwinter and need to be ended in spring. Match the choice to your climate and to your plans for the next crop.

• Plan around your frost dates
• Seed into firm, moist soil
• Ask extension for local seeding windows

How does termination timing affect wildlife?

When you mow, roll, till or otherwise end a cover crop, you affect any insects or nesting animals using it. Letting a flowering cover bloom before termination gives pollinators a resource, but you also have to consider seed set and weediness, and what your next crop needs.

Where possible, avoid mowing everything at once. Leaving a strip or sections standing for a while preserves refuge. Be mindful that ground-nesting birds and other animals may use covered fields in spring and summer.

• Delay termination until bloom where it fits
• Mow in sections instead of all at once
• Watch for nests before heavy work

What can go wrong?

Some cover crops can become weeds if allowed to set seed, and others can tie up moisture or nitrogen in ways that affect the next crop. A bad choice of species can also host pests. Start small, test on one bed or field and observe the results.

Be careful with herbicides used to end covers. Follow the label exactly, and consider non-chemical alternatives such as mowing or rolling. Pesticide use can harm pollinators and other wildlife, so protect blooming plants from drift.

Keep an eye on slugs, rodents and other pests that may use thick cover. Observing what shows up in a trial area before planting everywhere helps you adjust the mix and the termination method for your own conditions.

• Trial new species on a small area first
• Prevent seed set of weedy species
• Avoid spray drift onto flowering covers

Can you get help with cost?

Seed, labor and equipment are the main cost categories. Some conservation programs offer technical help or cost-share for cover crops, and availability varies by state and year. Local conservation districts and NRCS offices can tell you what is available and how to apply.

Keep your own records of what you planted, when, and what you observed. They help you refine the approach and make applications easier.

• Budget for seed, labor and equipment
• Ask NRCS about current programs
• Record species, dates and results

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