Start with a container and kitchen scraps

You can begin composting with almost nothing: a bin, a patch of ground, or even a pile in a corner. The simplest setup is a sealed container — a plastic storage bin with holes drilled in the bottom works, or you can buy a compost bin from a hardware store for $30 to $150. Fill it with alternating layers of brown material (dry leaves, shredded paper, cardboard) and green material (food scraps, grass clippings, plant trimmings). Keep it moist like a wrung-out sponge and turn it every week or two with a shovel or pitchfork.

If you have outdoor space, a straightforward pile on bare ground works just as well. No bin needed. Pile brown and green materials in the same ratio, keep it damp, and turn it regularly. The pile should be at least 3 feet by 3 feet to heat up properly. In 2 to 6 months, depending on how often you turn it and how warm your climate is, you will have dark, crumbly compost ready to mix into garden soil or potted plants.

If you have no outdoor space, a small indoor bin or a bokashi bucket (which ferments scraps in a sealed container) works for apartments. Bokashi bins cost $40 to $80 and use a special bran to speed fermentation; you then bury the fermented scraps in a garden or give them to someone who gardens.

Key Takeaways

  • A basic compost bin costs $30 to $150, but you can compost in a pile on the ground or in a sealed storage container with drainage holes.
  • Layer brown materials (leaves, paper, cardboard) and green materials (food scraps, grass) in roughly equal amounts, keeping the pile damp.
  • Turn the pile every week or two to speed decomposition; finished compost is ready in 2 to 6 months depending on effort and climate.
  • Never compost meat, dairy, oils, or diseased plants; stick to vegetable scraps, fruit, coffee grounds, eggshells, and yard waste.
  • Apartment dwellers can use small indoor bins or bokashi buckets, which ferment scraps for later burial or handoff to a gardener.

What goes in and what does not

Compost works because microbes and insects break down organic material. They work fastest on soft, nitrogen-rich scraps: vegetable and fruit peels, coffee grounds, tea bags, crushed eggshells, grass clippings, and plant trimmings. These are your green materials. Brown materials — dry leaves, shredded newspaper, cardboard, straw, wood chips — provide carbon and help the pile stay loose enough for air to reach the microbes.

Never add meat, fish, bones, dairy, oils, or fats. These attract rats and raccoons and create odor problems. Do not add diseased plants or weeds with seeds; the pile may not get hot enough to kill them. Avoid glossy or colored paper, pet waste, and treated wood. Citrus peels and onions slow decomposition, so use them sparingly. If you have a bokashi bucket, you can ferment meat and dairy there — the fermentation process is different and handles them safely.

Moisture, air, and temperature matter

A working compost pile needs three things: water, oxygen, and the right carbon-to-nitrogen ratio. The pile should feel like a wrung-out sponge — damp but not soggy. If it smells like ammonia or rotten eggs, it is too wet or has too much green material; add brown material and turn it. If it is not heating up and breaking down, it is probably too dry; water it lightly.

Turning the pile every week or two brings oxygen to the center, where the hottest decomposition happens. You do not have to turn it — a pile left alone will compost in 6 to 12 months — but turning speeds the process to 2 to 6 months. In warm climates, decomposition happens faster. In cold climates, the pile slows in winter and may not finish until spring.

The pile's center temperature can reach 130 to 150 degrees Fahrenheit if you maintain the right balance. You do not need a thermometer; if the pile is warm to the touch in the middle, it is working. If it stays cold, add more green material or turn it more often.

Where to put your compost bin

Place your bin or pile in a spot that gets partial sun — not full shade, which slows decomposition, and not in direct sun all day, which dries it out. A corner of the yard, against a fence, or under a tree works well. Make sure water can drain away from the bottom; do not set it on concrete or in a low spot where rain pools.

If you are composting in a bin, position it where you can easily add scraps and turn it. Keep it at least a few feet from your house to avoid attracting insects, though a well-maintained pile should not smell. If neighbors are close, a bin with a lid is more considerate than an open pile.

Finished compost and how to use it

Finished compost looks dark brown or black, crumbles in your hand, and smells earthy — not like rotting food. At this stage, you cannot see the original materials. Sift out any large pieces and return them to a new pile to break down further.

Mix finished compost into garden beds at a ratio of 1 part compost to 3 parts existing soil, or use it as a top dressing around plants and trees. For potted plants, mix 1 part compost with 2 parts potting soil. Compost improves soil structure, adds nutrients slowly, and helps soil hold water. You do not need to buy fertilizer if you compost regularly.

If you do not have a garden, offer finished compost to neighbors, community gardens, or local parks. Many gardeners welcome free compost, and it keeps material out of the landfill.

Common problems and how to fix them

Smell like ammonia or rotten eggs: The pile is too wet or has too much green material. Add dry brown material (leaves or shredded paper) and turn it. Reduce the amount of food scraps you add each week.

Pile is not heating up or breaking down: It is probably too dry, too small, or has too much brown material. Water it lightly, add more green material, or combine it with another pile to reach at least 3 feet by 3 feet.

Insects or rodents in the bin: Do not add meat, dairy, or oils. Bury food scraps under brown material so they are not visible on top. Use a bin with a tight-fitting lid. If you already have pests, stop adding food scraps for a few weeks and turn the pile daily.

Pile is wet and slimy: It is compacted and has no air. Turn it thoroughly and add coarse brown material like wood chips or straw to create air pockets.

Alternatives if you cannot compost at home

If you lack space or time, many cities and towns run compost collection programs. You put food scraps and yard waste in a bin, and the city picks it up weekly or monthly, just like trash. Check your local waste management website or call your city to see if this service is available in your area.

Community gardens often accept compost donations or let members drop off scraps. Some farmers markets have compost drop-off stations. A few grocery stores and garden centers also accept food scraps and yard waste for composting.

If none of these options exist near you, bokashi fermentation or vermicomposting (composting with worms in a small bin) are space-efficient alternatives that work indoors.

Frequently Asked Questions

How long does it take to get finished compost?

If you turn the pile every week or two and maintain the right moisture and carbon-to-nitrogen balance, finished compost is ready in 2 to 6 months. If you leave the pile alone without turning, it takes 6 to 12 months. Cold climates slow the process; warm climates speed it up.

Can I compost in winter?

Yes, but decomposition slows significantly in freezing temperatures. In cold climates, the pile may go dormant and resume breaking down in spring. You can keep adding scraps all winter; they will just sit until the weather warms. Insulating the pile with straw or leaves helps retain heat.

What if my compost smells bad?

A rotten-egg or ammonia smell means the pile is too wet or has too much green material. Add dry brown material like shredded paper or leaves, and turn the pile to add air. Reduce food scraps for a week or two. A healthy pile should smell earthy, not foul.

Do I need special tools to compost?

A shovel or pitchfork for turning is helpful but not required. You can turn a small pile with a stick or even your hands (wear gloves). A thermometer is optional; you can tell if the pile is working by touch. A bin or container is convenient but not necessary — a pile on the ground works fine.

Can I compost paper and cardboard?

Yes. Shred newspaper, cardboard, and paper bags into small pieces and layer them with green material. Glossy or colored paper should be avoided, but plain cardboard and newsprint break down well and add carbon to the pile.