Start with a container and brown-and-green layers

You can begin composting with a plastic bin, a wooden box, or even a pile in your yard. The simplest setup is a 18-gallon plastic storage container with a lid — drill holes in the bottom and sides for air flow, and you have a working bin. You do not need to buy a commercial composter.

Fill your bin with two types of material in layers. Brown materials are dry: shredded newspaper, cardboard, dried leaves, straw, and wood chips. Green materials are wet and nitrogen-rich: food scraps, grass clippings, coffee grounds, and plant trimmings. Start with a 4-inch layer of brown, then 4 inches of green, then brown again. This ratio — roughly three parts brown to one part green by volume — keeps the pile from smelling and speeds decomposition.

Key Takeaways

  • A basic bin is a plastic storage container with drilled holes; you can start composting for under $20 if you already have a container.
  • Layer brown materials (dry leaves, cardboard, straw) with green materials (food scraps, grass clippings, coffee grounds) in a 3-to-1 ratio to prevent odor and speed breakdown.
  • Turn the pile every one to two weeks with a shovel or pitchfork to add oxygen; finished compost is dark, crumbly, and ready in two to six months depending on temperature and how often you turn it.
  • Keep the pile as moist as a wrung-out sponge — too dry and decomposition stops, too wet and it smells like ammonia.
  • Avoid meat, dairy, oils, and pet waste, which attract pests or introduce pathogens that home compost does not get hot enough to kill.

What to add and what to avoid

Food scraps are the easiest green material to add. Vegetable and fruit scraps, eggshells, coffee grounds, and tea bags all break down in a home pile. Bury them under brown material so they do not attract flies. Grass clippings and plant trimmings also work, though fresh grass can mat down and slow air flow — mix it with brown material or let it dry first.

Do not add meat, fish, bones, dairy, oils, or fats. These either smell as they decompose or take months longer to break down than home compost gets hot enough to handle. Pet waste and diseased plants also belong in the trash. Glossy or colored paper and cardboard with plastic coating do not belong either — stick to plain cardboard and newspaper.

Turn the pile and monitor moisture

Decomposition happens fastest when you turn the pile — that is, dig into it with a shovel or pitchfork and move material from the outside to the center. Turn it every one to two weeks if you want finished compost in two to three months. If you turn it less often or not at all, decomposition still happens but takes four to six months or longer.

Check moisture by squeezing a handful of material. It should feel like a wrung-out sponge — damp but not dripping. If it is dry, add water or green material. If it smells like ammonia, it is too wet; add brown material and turn it to add air. A pile that is too dry will stop decomposing. A pile that is too wet will smell and attract flies.

Recognize finished compost and use it

Finished compost is dark brown or black, crumbly, and smells like soil. You should not be able to identify the original materials — they have all broken down. If you still see food scraps or leaves, the pile is not ready; keep turning it and wait another few weeks.

Use finished compost in garden beds, potted plants, or mixed into lawn soil. You can also layer it on top of soil as mulch. One bin usually produces enough compost in a season to amend a small garden or fill several large pots. If you garden regularly, you may want two bins — one you are filling while the other finishes decomposing.

Troubleshoot common problems

If your pile smells like rotten eggs or ammonia, it is too wet or has too much green material. Stop adding scraps, add brown material, and turn it to add air. If it smells like vinegar, the pile is anaerobic (no oxygen) — turn it more often.

If you see flies or maggots, you added meat, dairy, or oil, or you did not bury food scraps deep enough. Remove the offending material if you can find it, bury future scraps under at least 4 inches of brown, and turn the pile. If the pile is not heating up or decomposing, it may be too dry, too small (less than 3 feet on a side), or have too much brown material — add water and green scraps, and turn it.

Choose a location and container style

Place your bin in a spot that gets partial shade — full sun dries it out too fast, and full shade slows decomposition. Make sure water can drain away from the base so it does not pool. If you live in an apartment or have limited space, a 5-gallon bucket with a lid works, though it takes longer and requires more frequent turning.

If you have yard space, a three-bin system (three wooden boxes side by side) lets you fill one bin while another finishes and a third sits empty. You can build one from untreated wood for $30 to $50 in materials. A single open pile works too if you do not mind the appearance — cover it loosely with a tarp to keep rain from washing nutrients away and to reduce smell.

Frequently Asked Questions

Can I compost in winter?

Yes, but decomposition slows dramatically in cold weather. In freezing climates, the pile may stop breaking down entirely until spring. You can keep adding material through winter and let it sit; it will decompose when temperatures rise. Insulating the bin with straw or leaves helps retain heat.

How do I know if my compost is done?

Finished compost is dark, crumbly, and smells earthy — like soil. You should not see recognizable food scraps or leaves. If you are unsure, wait another two to four weeks and turn the pile again. Compost that is not quite finished will not hurt plants, but fully finished compost mixes more evenly into soil.

What if I do not have a yard?

Apartment dwellers can use a small bin under the sink or on a balcony, or try vermicomposting (composting with worms in a shallow bin). You can also save scraps in a sealed container in the freezer and take them to a community garden or farmers market that accepts compost.

Do I need to add anything to speed up composting?

No. Compost happens on its own as long as you have the right mix of brown and green, moisture, and air. Commercial "compost starters" are not necessary — the microbes that break down material are already in your kitchen scraps and yard waste.

Can I compost sawdust or wood chips?

Yes, but only from untreated wood. Sawdust and chips from pressure-treated lumber contain chemicals that do not break down and can contaminate your compost. Untreated wood takes longer to decompose than leaves or paper, so use it sparingly and be patient.