The simplest way to start composting

You can make compost by layering brown materials (dry leaves, shredded paper, cardboard) with green materials (food scraps, grass clippings, plant trimmings) in a pile or bin, keeping it moist like a wrung-out sponge, and turning it every few weeks. The microbes and fungi already present in the materials break them down into dark, crumbly compost in two to six months, depending on how often you turn the pile and how warm your climate is.

You do not need special equipment, a large space, or any added chemicals. A corner of your yard, a plastic storage bin with holes drilled in it, or even a tumbling composter all work. The only real requirement is mixing the right ratio of materials and keeping the pile from getting too wet or too dry.

Key Takeaways

  • Layer brown materials (leaves, paper) with green materials (food scraps, grass) in roughly equal amounts by volume to speed decomposition.
  • Keep the pile as moist as a wrung-out sponge—too wet causes odor and mold, too dry slows breakdown.
  • Turn the pile every one to two weeks if you want finished compost in two to three months, or leave it undisturbed for six months to a year for slower decomposition.
  • Avoid meat, dairy, oils, and diseased plants, which attract pests or spread plant illness.
  • Finished compost is dark brown, crumbly, and smells like soil—use it in gardens, potted plants, or lawn.

What materials go in and what to avoid

Brown materials are dry and carbon-rich: fallen leaves, shredded newspaper or cardboard (no glossy coatings), straw, wood chips, and sawdust from untreated wood. Green materials are moist and nitrogen-rich: vegetable and fruit scraps, coffee grounds and tea bags, grass clippings, plant trimmings, and manure from herbivores like horses or rabbits.

Do not add meat, fish, bones, dairy, oils, fats, or pet waste—these attract rats and raccoons or introduce pathogens. Avoid diseased plant material, weeds with seeds, and glossy or colored paper. Grass clippings treated with herbicide and wood from pressure-treated lumber also belong out of the pile.

Aim for roughly equal volumes of brown and green materials. If your pile smells like ammonia or looks slimy, you have too much green; add more brown and turn it. If decomposition stalls and the pile stays cold, you likely need more green material or smaller pieces to increase surface area.

Building and maintaining your pile

Start with a layer of coarse brown material (sticks, wood chips) on the ground to allow air flow underneath. Alternate layers of brown and green, each about 4 to 6 inches thick, until your pile is at least 3 feet tall and 3 feet wide—this size retains heat and speeds decomposition. Smaller piles work but take longer.

Water each layer as you build so the finished pile feels like a wrung-out sponge. You should be able to squeeze a few drops of water from a handful, but not a stream. Check moisture weekly; add water if it dries out, or add brown material if it becomes soggy and smells.

Turn the pile every one to two weeks by moving material from the outside edges to the center, where it is hottest. Turning speeds decomposition to two to three months but is optional—an undisturbed pile will compost in six months to a year. If you do not turn, build the pile all at once rather than adding scraps gradually, so materials break down together.

Choosing a container or location

An open pile on bare ground is free and works well if you have space and do not mind the appearance. A wooden bin made from untreated lumber or a wire cylinder keeps the pile contained and looks neater. Plastic storage bins with drilled holes work for small-scale composting in apartments or tight yards.

Tumbling composters—rotating drums on stands—mix the pile for you with each turn of a handle, cutting the time to finished compost to four to eight weeks. They cost more upfront but require less physical effort and keep rodents out more effectively.

Place your pile or bin in a spot that gets partial sun and has good drainage. Full sun speeds decomposition but can dry the pile out faster. Avoid low spots where water pools, and keep it at least a few feet from your house to minimize odor and pest traffic.

Recognizing finished compost and using it

Finished compost is dark brown or black, crumbly, and smells earthy like forest soil. You should not see recognizable food scraps or leaves—if you do, let it sit longer. The pile shrinks to about one-third its original volume as materials break down.

Sift finished compost through a screen or old window screen to remove sticks and large pieces, which you can return to a new pile. Use the finished product in vegetable gardens, flower beds, potted plants, or mixed into lawn soil. A 2- to 4-inch layer worked into the top few inches of garden soil improves water retention and adds nutrients.

If you are still composting and want to use some of the material, harvest from the bottom of an open pile or the access door of a bin—the bottom layers finish first. Leave the top layers to continue breaking down.

Troubleshooting common problems

Pile smells like ammonia or rotten eggs: Too much green material or not enough air. Add brown material, turn the pile, and make sure it is not waterlogged. Reduce how often you add scraps until the smell clears.

Pile is cold and not decomposing: Too much brown material, pieces are too large, or the pile is too small. Shred or chop materials into smaller pieces, add more green material, and turn the pile to introduce oxygen. A pile smaller than 3 feet on each side may not generate enough heat to decompose quickly.

Rodents or insects are visible: You likely added meat, dairy, or oils. Stop adding those materials when ready. Bury food scraps under at least 6 inches of brown material so they are not exposed. If the problem persists, switch to a closed bin or tumbler.

Pile is too wet and soggy: Add brown material, turn the pile to aerate it, and reduce watering. If your area gets heavy rain, cover the top of an open pile with a tarp or move it to a drier spot.

Frequently Asked Questions

How long does it really take to make compost?

If you turn the pile every one to two weeks and maintain the right moisture and material balance, you can have finished compost in two to three months. An undisturbed pile takes six months to a year. Temperature matters too—warm climates decompose faster than cold ones.

Can I compost in winter?

Yes, but decomposition slows dramatically in freezing temperatures. In cold climates, pile materials in fall and let them sit through winter; they will finish breaking down in spring and early summer. You can keep adding scraps to the pile even in winter, but do not expect finished compost until the weather warms.

Do I need to buy compost starter or activator?

No. The microbes and fungi that break down compost are already present in soil, leaves, and manure. Commercial starters are not necessary and do not speed decomposition meaningfully. A shovel of finished compost or garden soil mixed into a new pile introduces active microbes, but it is optional.

What if I do not have space for a full pile?

A plastic storage bin with holes drilled in the bottom and sides works in a closet, garage, or apartment balcony. Fill it with alternating layers of brown and green, keep it moist, and turn it weekly. You will get smaller batches of finished compost, but the process is the same.

Can I add sawdust or wood shavings?

Yes, as long as the wood is untreated. Sawdust and shavings are excellent brown material. Use them from untreated pine, oak, or hardwoods. Avoid sawdust from pressure-treated lumber, which contains chemicals that do not break down and can contaminate soil.