How to Compost in Cold Weather: Winter Composting Tips That Actually Work

Cold weather does not mean composting needs to stop. Food scraps, leaves, coffee grounds, and other organic materials can continue going into a compost system throughout fall and winter. The main difference comes down to speed.

Microorganisms become less active as temperatures fall, so decomposition slows. Outdoor compost piles may freeze during long stretches of cold weather. That does not mean the compost is ruined or dead. Activity usually returns as the pile warms during a sunny afternoon, a temporary thaw, or the arrival of spring. A few seasonal changes can help protect the pile, retain heat, manage moisture, and prevent frozen food scraps from becoming a problem. Some composting methods also perform better than others during winter.

This guide covers:

• How cold temperatures affect compost

• Ways to keep a compost pile warmer

• The best winter composting methods

• What to do when compost freezes

• How to manage food scraps all season

• Common winter composting problems

• Holiday food waste and packaging

• Cold-weather worm bin care

Winter composting may move slowly, but every food scrap added now brings the pile closer to finished compost for spring.

Can You Compost During Winter?

Yes. Composting can continue during winter, even in regions with snow, ice, and freezing temperatures. A compost pile does not need to remain hot every day to provide value. Materials added during winter can sit in place until warmer temperatures restart active decomposition. Freezing and thawing may even help soften plant material and break apart food scraps, making them easier for microorganisms to process later.

A winter pile may look inactive from the outside while the center remains warmer. Large piles retain more heat than small piles because the outer materials help insulate the core. Composting through winter also keeps the routine consistent. Kitchen scraps continue accumulating every day, so maintaining a collection system prevents those materials from returning to the trash during colder months.

Does Compost Freeze?

Compost can freeze when outdoor temperatures remain below 32°F for an extended period. Small compost bins and tumblers usually freeze sooner than large backyard piles. Materials near the outer edges cool first, while the center may remain active for longer.

Frozen compost is not ruined. The organisms responsible for decomposition become less active or dormant during very cold conditions. Many return to work once temperatures rise. The pile may appear unchanged for weeks or months, then begin shrinking quickly during the first warm stretch of spring. Repeated freezing and thawing can also help rupture the cell walls of fruits, vegetables, and plant material. This process may make those materials easier to break down once microbial activity increases again.

There is no need to throw away a frozen compost pile or start over. Continue collecting materials, manage the pile as conditions allow, and give nature time to catch up.

How Cold Weather Changes Composting

Temperature affects nearly every part of the composting process. Microorganisms generate heat as they consume organic matter, but their activity slows as the surrounding environment becomes colder. A well-built pile may produce enough internal heat to remain active during cool weather. Sustained freezing temperatures make that much harder. Several changes become common during winter.

Decomposition Slows

Food scraps and yard waste take longer to break down. Materials that disappeared within a few weeks during summer may remain visible for months during winter. Slower decomposition is normal and does not automatically signal a problem.

Moisture Becomes Harder to Manage

Snow, freezing rain, and winter storms can leave compost piles overly wet. Cold air and strong winds may also dry exposed materials. A healthy compost pile should feel damp, similar to a wrung-out sponge. Standing water, matted food scraps, or a sour smell often point to excess moisture.

Learn more in Too Dry or Too Wet? How to Keep Your Compost at the Ideal Moisture Level.

Turning Releases Heat

Turning compost introduces oxygen, but it also opens the warm center to cold air.

Frequent turning may help during warm weather, but winter piles often benefit from less disturbance. Turning only when the pile becomes compacted, overly wet, or smelly helps preserve internal warmth.

Food Scraps Accumulate Faster

New materials may enter the pile faster than older materials can decompose. This can create dense layers of frozen scraps. Adding plenty of dry browns around each food scrap layer helps control moisture, odors, and pests.

Compost May Stop Shrinking

An active summer pile can lose volume quickly. A winter pile may stay full for much longer. Leave extra room in the bin whenever possible. A second storage container may also help manage food scraps during severe weather.

Why Composting in Cold Weather Matters

Winter composting keeps organic materials in use all year instead of sending them to a landfill.

It Reduces Household Waste

Food scraps continue accumulating during winter. Holiday meals, baking, warm drinks, and indoor cooking may create even more organic waste than usual. Collecting fruit and vegetable scraps, coffee grounds, paper filters, and suitable food-soiled paper can significantly reduce the amount of trash leaving the home.

Food waste prevention should always come first. Meal planning, proper storage, freezing leftovers, and sharing surplus food save more resources than composting. Composting becomes the next step for inedible scraps and spoiled food that cannot be rescued.

It Builds Compost for Spring

Materials collected during winter become part of the composting process long before planting season begins. A pile may not finish during the coldest months, but it can begin decomposing quickly as temperatures rise. Starting in winter gives gardeners a head start on compost for garden beds, trees, shrubs, and landscaping.

It Preserves the Habit

Stopping for several months can make composting harder to restart.

Continuing the routine keeps collection containers in place, reminds household members what belongs in compost, and prevents food scraps from returning to the trash.

It Protects Valuable Fall Leaves

Dry autumn leaves are one of the best brown materials for composting. Saving bags or bins of leaves provides a steady carbon source throughout winter. They can cover food scraps, absorb moisture, improve airflow, and reduce odors.

Cold Composting vs. Hot Composting in Winter

Cold composting and hot composting can both work during winter, but they require different expectations.

Cold Composting

Cold composting is a slower, low-maintenance method. Materials are added over time and left to decompose with occasional mixing. This approach works well during winter because the pile does not need to maintain a high internal temperature. Food scraps may freeze, thaw, and remain visible until spring. Cold composting takes longer, but it requires less monitoring and turning. Learn more in What Is Cold Composting?

Hot Composting

Hot composting relies on a large, balanced pile with enough moisture, oxygen, carbon, and nitrogen to generate substantial internal heat. Maintaining a hot pile through winter can be difficult, especially in very cold climates. The process works best with:

• A pile measuring at least 3 feet wide and 3 feet tall

• A steady supply of greens and browns

• Chopped or shredded materials

• Protection from wind and precipitation

• Regular temperature monitoring

• Enough moisture to support microbial activity

A pile does not need to stay above 104°F to count as successful composting. Lower temperatures still allow decomposition to continue, just at a slower rate. Home composters focused on reducing waste can use cold composting throughout winter without chasing a specific thermometer reading. Gardeners working toward fast, finished compost may choose a more actively managed hot pile.

How to Keep a Compost Pile Warm in Winter

No outdoor system can completely ignore winter weather, but several steps help retain more heat.

Build a Larger Pile

Larger piles lose heat more slowly than smaller ones. A pile around 3 feet wide and 3 feet tall has enough mass to support a warmer center. Smaller piles still compost, though they may freeze more quickly. Combine loose materials into one pile before winter instead of spreading them across multiple partially filled bins.

Protect the Pile From Wind

Cold wind pulls heat from the compost pile and dries exposed materials. Place the pile near a fence, shed, wall, hedge, or other windbreak. Avoid blocking drainage or placing the bin directly against a structure that could be damaged by moisture.

Use Natural Insulation

Straw bales, bags of leaves, cardboard, and dry mulch can create an insulating barrier around a compost bin. A thick layer of browns on top also protects the active material beneath it. Leaves, shredded cardboard, straw, and untreated wood chips work well.

Cover the Top

A tarp, fitted lid, or piece of unfinished plywood can keep excess rain and snow from soaking the pile. The cover should not create a fully airtight environment. Compost still needs some airflow.

Place the Bin in Sunlight

A sunny winter location can help warm the surface of a dark compost bin or tumbler. Summer shade may be helpful in hot climates, but winter sun provides useful heat during shorter days.

Add Smaller Pieces

Small pieces offer more surface area for microorganisms. Chop large vegetable scraps, break up cardboard, and crush dry leaves before adding them. This step becomes especially helpful during winter when decomposition already moves slowly.

Store Browns Nearby

Keep dry leaves, shredded cardboard, torn paper bags, or straw beside the compost bin. Cover every new layer of food scraps with browns. This simple habit supports airflow, absorbs moisture, and creates insulation.

Should You Turn Compost During Winter?

Winter compost generally needs less turning than summer compost. Opening the pile releases heat from the center. Turning too often can cool the entire system and slow decomposition further. Leave a healthy, odor-free pile alone for longer stretches. Turn or loosen the materials when:

• The pile smells sour or rotten

• Food scraps form wet, compacted layers

• Water collects inside the bin

• Airflow becomes restricted

• Large amounts of fresh material need mixing

A compost aerator can introduce oxygen with less disruption than completely rebuilding the pile. Strong odors often come from too much moisture, too many greens, or limited airflow. Adding dry browns may solve the problem without a full turn.

Read How to Get Rid of Compost Smell for more troubleshooting help.

Best Composting Methods for Cold Weather

Some composting systems handle winter better than others. Outdoor piles may slow or freeze, while indoor systems can remain active throughout the season. Choosing the right approach depends on available space, climate, food scrap volume, and the amount of maintenance you want to provide.

Backyard Compost Piles

Backyard piles remain one of the most reliable winter composting methods because they can hold more material than small bins or tumblers. Greater volume helps the center retain heat. A pile around 3 feet wide and 3 feet tall has a better chance of staying active during cold weather than a thin or partially filled pile. For stronger winter results:

• Consolidate loose materials into one large pile

• Add a thick layer of browns on top

• Protect the pile from wind

• Cover it during heavy rain or snow

• Turn less often

• Chop food scraps into smaller pieces

Continue adding food scraps through winter, even when the pile freezes. Bury each addition near the center and cover it with leaves, shredded cardboard, or another dry brown material. A frozen pile may remain unchanged until spring. Once temperatures rise, decomposition usually resumes without any special treatment.

Compost Tumblers

Compost tumblers keep materials enclosed, reduce pest access, and make turning easier. Their smaller size also causes them to lose heat quickly. Many tumblers freeze solid during prolonged cold weather. The materials inside are still compostable and can continue breaking down after thawing.

Place the tumbler in the sunniest available location and protect it from strong winds. A dark tumbler may absorb some heat on clear winter days. Add materials in small pieces and maintain a generous supply of browns. Tumblers can become wet and compacted when food scraps accumulate faster than they decompose.

Avoid forcing a frozen tumbler to rotate. Ice may place unnecessary stress on the frame, handle, or internal components. Leave it in place until the contents soften. Our guide How to Use a Compost Tumbler covers material ratios, moisture, turning, and common problems in more detail.

Worm Composting During Winter

Worm composting works well during winter when the bin stays indoors or in a protected temperature-controlled space. Red wigglers perform best in moderate temperatures. Their feeding and reproduction slow as the bin becomes colder, and extended freezing conditions can kill the worms. Good winter locations include:

• A laundry room

• A mudroom

• A basement

• A utility room

• A heated garage

• A temperature-controlled shed

• A classroom or office

Keep worm bins away from heating vents, fireplaces, radiators, and direct sources of heat. Sudden temperature swings can create stressful conditions inside the bin.

Reduce Feeding in Cool Conditions

Worms eat less as temperatures fall. Check the bin before adding more food. Add a small amount only after most of the previous feeding has disappeared. Too much food can rot, smell, attract fruit flies, and create acidic conditions.

Add More Bedding

Shredded cardboard, paper, and dry leaves help regulate moisture and create pockets of air throughout the bin. A deeper bedding layer also gives worms more protected areas to move through.

Monitor Moisture

Indoor heating can dry worm bedding. Cool garages and basements may create the opposite problem by reducing evaporation. The bedding should feel moist but not waterlogged. Add dry cardboard when the bin feels wet. Mist lightly with water when the bedding feels dry and brittle.

Protect Outdoor Worm Bins

Outdoor worm bins need significant protection in cold climates. Insulation may include:

• Straw bales

• Bags of dry leaves

• Thick layers of cardboard

• Blankets protected by a waterproof cover

• Rigid foam placed around the outside

Insulation slows heat loss, but it does not create heat. An outdoor bin can still freeze during severe weather. Bringing the worms indoors provides the most reliable protection. Read Worm Composting Temperature Guide: How Hot or Cold Is Too Hot or Cold? for more detailed temperature guidance.

Bokashi Composting

Bokashi offers one of the most practical winter composting options because the fermentation stage takes place indoors inside an airtight container. Food scraps are layered with Bokashi bran, compressed to remove air, and sealed. The materials ferment rather than decompose in the traditional aerobic sense. Bokashi can accept many foods that outdoor compost piles commonly avoid, including:

• Meat

• Dairy products

• Cooked foods

• Small bones

• Oily foods

The fermented material still needs a finishing step. It can be buried in soil, added to a compost pile, or placed in a soil factory. Frozen ground may delay burial until spring. During that time, sealed buckets can remain stored in a protected area. Learn more in How to Bokashi Compost.

Trench Composting

Trench composting places organic materials directly into the ground. This low-maintenance method works well during fall and early winter before the soil becomes too hard to dig. Dig a trench or hole around 12 inches deep, add food scraps, then cover the materials with several inches of soil. The buried scraps slowly decompose and add organic matter to the surrounding soil. Trench composting works well for:

• Empty garden beds

• Areas planned for spring planting

• Space between rows

• Future tree or shrub locations

• Food scraps that may attract pests in an open pile

Avoid burying scraps directly against active plant roots. Concentrated decomposing material can temporarily affect the surrounding soil. Prepare several trenches before the ground freezes. Mark each location so the same area does not get opened again by mistake.

Indoor Food Scrap Storage

Severe winter weather may make the outdoor compost bin difficult to access. A temporary indoor storage system helps bridge the gap between kitchen collection and outdoor composting. Popular options include:

• A covered kitchen compost caddy

• A sealed bucket in a garage

• A reusable container in the freezer

• A paper bag stored inside the freezer

• A lidded container on a sheltered porch

Freezing food scraps prevents odors and fruit flies. It also softens many materials after thawing, which can support faster decomposition later. Avoid storing wet scraps in thin plastic bags that may tear after freezing. Use a sturdy reusable container instead. Empty the container into the compost pile during a safe break in the weather.

What to Compost During Winter

Most materials suitable for compost during warm weather can also be added during winter. Common winter compost materials include:

Fruit and Vegetable Scraps

Peels, cores, stems, rinds, and spoiled produce provide nitrogen and moisture. Cut large pieces into smaller sections before adding them to a cold pile.

Coffee Grounds and Paper Filters

Coffee grounds provide nitrogen and can support microbial activity. Paper filters add a small amount of carbon. Used coffee grounds are not a brown material, despite their color. Read Are Coffee Grounds Good for Compost? Here's the Answer for more guidance.

Tea Leaves

Loose tea leaves compost easily. Tea bags need closer inspection because some contain plastic fibers, staples, adhesives, or synthetic mesh.

Eggshells

Crushed eggshells can go into compost, though they break down slowly. Rinse and crush them to reduce visible pieces in finished compost.

Dry Leaves

Stored autumn leaves are one of the most useful winter compost materials. Use them to:

• Cover food scraps

• Absorb excess moisture

• Add carbon

• Improve airflow

• Insulate the pile

Shredded Cardboard

Plain corrugated cardboard provides carbon and helps separate wet food scraps. Remove plastic tape, shipping labels, and glossy coatings before shredding.

Plain Paper

Brown paper bags, uncoated paper, and plain paper egg cartons can support a winter pile. Avoid heavily coated, metallic, glittered, or laminated paper.

Materials That Need Extra Care During Winter

Cold temperatures slow decomposition, so certain materials may remain in the pile for a long time.

Large Food Scraps

Whole pumpkins, cabbage heads, melons, and dense vegetable pieces can freeze into solid blocks. Cut them into smaller pieces before adding them.

Bread, Rice, and Pasta

Small amounts can compost, but large quantities may form dense clumps and attract pests. Bury them near the center and surround them with browns.

Wet Paper Products

Napkins and paper towels can become compacted when added in thick layers. Tear them into smaller pieces and mix them with dry leaves or cardboard.

Wood and Branches

Large branches decompose slowly in every season. Chip or cut woody materials into smaller pieces, or use them as the base of a long-term pile.

Winter Composting Problems and Simple Fixes

Cold weather creates a few predictable challenges. Most winter compost problems require patience and small adjustments rather than a complete restart.

The Compost Pile Froze

A frozen pile can remain in place until temperatures rise. Continue collecting food scraps and add them during warmer periods. Another option involves freezing scraps indoors until the pile becomes accessible. There is no need to pour boiling water into the compost. Sudden heat can create uneven conditions and will not provide lasting warmth.

The Pile Smells Bad

Winter odors often come from excess food scraps, limited oxygen, or too much moisture. Add dry browns and gently loosen compacted areas. Cover exposed food and keep rain or snow from saturating the pile.

The Pile Is Too Wet

Add shredded cardboard, leaves, straw, or torn paper bags. Improve drainage around the base and use a cover that still allows some airflow.

The Pile Is Too Dry

Cold wind and dry air can remove moisture from exposed compost. Add small amounts of water during a period above freezing and mix only the dry outer areas. Moist food scraps may provide enough moisture without extra water.

Animals Are Digging Into the Pile

Bury food scraps deeply and cover every addition with browns. Avoid meat, dairy, grease, and large quantities of bread in open backyard piles. A secure lid or hardware cloth around the base can provide additional protection.

The Bin Is Full

Winter materials often accumulate faster than they decompose. Create temporary overflow storage using a second bin, sealed bucket, or bag of frozen scraps. Stored leaves can also hold dry yard waste until space opens.

Nothing Seems to Be Happening

Slow or invisible decomposition is normal during winter. The pile may remain active in the center, or it may simply wait for warmer weather. Both outcomes are acceptable. The goal during the coldest months may be collection and storage rather than rapid finished compost.

15 Winter Composting Tips for Better Results

Cold weather composting becomes much easier with a few seasonal adjustments. These simple habits help protect your compost pile, reduce common problems, and prepare materials for faster decomposition once temperatures rise.

1. Save Leaves in the Fall

Autumn leaves are one of the best composting resources you'll use all year. Store several bags of dry leaves before winter arrives. They provide an excellent source of carbon while helping absorb moisture, reduce odors, and insulate food scraps.

2. Chop Materials Into Smaller Pieces

Small pieces decompose more quickly because microorganisms have more surface area to work on. Cut large vegetable scraps, pumpkins, corn cobs, and cardboard into smaller pieces before adding them to the pile.

3. Cover Every Layer of Food Scraps

Kitchen scraps should always be covered with browns such as leaves, shredded cardboard, or straw. This simple habit helps:

• Reduce odors

• Discourage pests

• Improve airflow

• Retain heat

• Balance moisture

4. Freeze Kitchen Scraps

Snowstorms, icy sidewalks, and frozen compost bins sometimes make daily trips outside inconvenient. Collect food scraps in a reusable container inside the freezer until conditions improve. Frozen scraps stay odor-free and can be added all at once.

5. Keep Extra Browns Nearby

Store a bin of shredded cardboard or dry leaves next to your compost pile. Having browns within reach makes it much easier to cover food scraps every time you add them.

6. Protect the Pile From Heavy Snow

Snow can act as insulation, but large amounts of melting snow may leave the pile overly wet. A simple lid or tarp helps manage excess moisture while allowing some airflow.

7. Don't Worry About a Frozen Surface

The outside of the compost pile often freezes first. The center may remain warmer for weeks, especially in larger piles. Even a completely frozen pile usually returns to normal once spring temperatures arrive.

8. Add Coffee Grounds Regularly

Coffee grounds provide nitrogen that supports microbial activity. Many coffee shops also give away used grounds for free, making them an excellent winter compost ingredient.

9. Watch Moisture More Than Temperature

Many beginners focus entirely on compost temperature. Moisture usually creates more problems during winter. A pile that's soaking wet or completely dry will decompose much more slowly than one with balanced moisture.

10. Skip Perfect Ratios

Winter composting doesn't require measuring every handful of greens and browns. Aim for variety instead of perfection. Add plenty of carbon-rich materials whenever the pile starts looking wet or dense.

11. Keep Collecting Food Scraps

Even during the coldest weeks, continue collecting compostable materials. A winter pile often becomes active again as temperatures rise, giving those stored scraps a head start.

12. Leave Worm Bins Indoors

Indoor worm bins remain productive throughout winter. Moving the bin into a climate-controlled space protects both the worms and the composting process.

13. Expect Slower Results

Patience becomes part of winter composting. Food scraps may remain visible much longer than they would during summer. That doesn't mean something has gone wrong.

14. Prepare for Spring

Late winter is a great time to gather cardboard, leaves, garden supplies, and compost storage containers. Everything will be ready once warmer temperatures return.

15. Stay Consistent

The most successful composters simply keep going. Winter may slow decomposition, but maintaining the habit means less waste enters the landfill and more compost will be available for spring gardening.

Holiday Composting Made Easy

The holiday season often creates more food waste than any other time of year. Family dinners, baking, parties, and gift giving all generate compostable materials that can stay out of the trash with a little planning. Common holiday compost materials include:

• Vegetable peels

• Fruit scraps

• Pumpkin remnants

• Coffee grounds

• Tea leaves

• Eggshells

• Wilted flowers

• Plain paper napkins

• Paper towels used with food

• Plain cardboard boxes

• Brown paper packaging

Always remove tape, plastic windows, glitter, metallic coatings, and foam packaging before composting paper products. Holiday meals also provide a great opportunity to teach children about composting. Keeping a small kitchen compost caddy nearby allows everyone to participate by sorting food scraps before cleanup begins.

Large gatherings also create opportunities to reduce food waste before composting. Save leftovers for future meals, freeze extra portions, or donate unopened food whenever possible.

Food Waste Prevention Comes First

Composting plays an important role in reducing landfill waste, but the most sustainable food never becomes waste in the first place. Simple habits such as meal planning, shopping with a grocery list, storing produce correctly, and freezing leftovers often prevent far more waste than composting alone.

Food rescue also deserves priority. Safe, edible food can support neighbors, food banks, community refrigerators, or family members instead of entering a compost pile.

Composting works best as the final step for materials that truly cannot be eaten, donated, or reused. Our Food Waste Prevention Guide shares additional strategies for reducing waste before composting becomes necessary.

Winter Composting Myths

Myth: Composting Stops Completely During Winter

Decomposition slows, but it rarely stops forever. Most compost piles become active again as temperatures increase.

Myth: A Frozen Compost Pile Is Ruined

Frozen compost simply pauses the process. Microorganisms become active again after conditions improve.

Myth: Snow Always Hurts Compost

A light layer of snow can actually help insulate the pile. Problems usually come from excessive moisture after snow melts.

Myth: Compost Should Be Turned Every Week During Winter

Too much turning releases valuable heat. Winter piles usually benefit from less disturbance than summer piles.

Myth: Worm Composting Has to Stop

Indoor worm bins continue working throughout winter when temperatures remain comfortable for the worms.

Frequently Asked Questions

Can compost freeze?

Yes. Frozen compost usually becomes active again after temperatures rise.

Should I stop adding food scraps during winter?

No. Continue adding compostable materials and cover them with browns.

Can I compost snow?

Snow itself doesn't compost, but small amounts generally won't harm a compost pile.

How often should I turn compost during winter?

Only as needed to improve airflow or correct moisture problems.

Can worms survive winter?

Indoor worm bins usually do very well during winter. Outdoor worm bins need significant protection from freezing temperatures. Read our Worm Composting Temperature Guide for more information.

Can I compost Christmas tree needles?

Yes. Chop branches into smaller pieces whenever possible. Needles decompose slowly but still make a useful carbon source.

Can I compost wrapping paper?

Plain paper wrapping paper usually composts well. Avoid glossy, metallic, glittered, laminated, or plastic-coated paper.

Does compost smell more during winter?

Healthy compost should continue smelling earthy. Strong odors often indicate excess moisture or poor airflow. Read How to Get Rid of Compost Smell for troubleshooting tips.

Is winter a good time to start composting?

Absolutely. Starting during winter builds good habits and gives your compost pile a head start before spring gardening begins.

Composting in Cold Weather

Cold weather changes the pace of composting, but it doesn't bring the process to an end. Microorganisms continue working whenever conditions allow, and materials collected during winter become valuable compost as temperatures rise. Every fruit peel, coffee ground, fallen leaf, and piece of cardboard added today supports healthier soil in the months ahead.

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About Let’s Go Compost

Let’s Go Compost is a national nonprofit making composting simple, affordable, and accessible. Our programs bring hands-on composting to communities, helping people turn food and plant waste into healthy soil that supports food systems, native plant ecosystems, and pollinators. Learn more at letsgocompost.org and support our work at letsgocompost.org/donate.