You can compost at home with a bin, pile, or tumbler, and it costs between $30 and $300 depending on what you build

The simplest compost system is a pile in your yard: layer brown materials (dry leaves, shredded paper, cardboard) with green materials (food scraps, grass clippings, plant trimmings), keep it moist, and turn it every few weeks. You need nothing but a shovel and space. A basic bin made from wooden pallets or wire fencing costs almost nothing to build. If you want faster results and less smell, a sealed plastic bin ($30 to $80) or a rotating tumbler ($100 to $300) speeds decomposition by containing heat and moisture, and keeps rodents out.

The time from start to finished compost ranges from two months in a hot tumbler to six months in an open pile, depending on how often you turn it and how finely you chop your materials. Most home gardeners aim for a system that takes three to four months and requires turning once a week or less.

Key Takeaways

  • Brown materials (leaves, paper, cardboard) and green materials (food scraps, grass) must be layered in roughly equal amounts by weight for compost to break down properly.
  • A straightforward pile costs nothing; a wooden bin costs $20 to $50 to build; a plastic bin runs $30 to $80; a tumbler costs $100 to $300.
  • Finished compost is ready when it looks like dark, crumbly soil and smells earthy, usually three to six months after you start.
  • Meat, dairy, oils, and diseased plants should not go in home compost because they attract pests or spread disease to your garden.

What materials go in and what stays out

Green materials (nitrogen-rich) include fruit and vegetable scraps, coffee grounds and tea bags, fresh grass clippings, plant trimmings, and manure from herbivores like horses or rabbits. Brown materials (carbon-rich) include dry leaves, shredded newspaper and cardboard, straw, wood chips, and sawdust from untreated wood.

Do not add meat, fish, bones, dairy, oils, fats, or pet waste. These attract rats and raccoons, or introduce pathogens that survive home composting temperatures. Diseased plant material, weeds with seeds, and grass treated with herbicides should also stay out. Glossy or colored paper, pressure-treated wood, and coal or charcoal ash do not break down safely.

Aim for a ratio of roughly three parts brown to one part green by volume, or one part brown to one part green by weight. Too much green material makes the pile smell like ammonia; too much brown slows decomposition. Chop or shred larger pieces — smaller pieces decompose faster.

Building a compost bin from materials you have

A wooden pallet bin is the cheapest option. Find four wooden pallets (often free from businesses that receive shipments), stand them on edge to form a square, and wire or bolt them together at the corners. Leave one side hinged or removable so you can pull finished compost from the bottom. Line the inside with hardware cloth (quarter-inch wire mesh) if rodents are a problem in your area.

A wire bin works the same way: roll a length of wire fencing into a cylinder, find the ends with wire or zip ties, and set it on the ground. This style is lighter and easier to move than pallets, but offers less protection from pests.

A three-chambered bin lets you compost in one section while the others cure and finish. Build three side-by-side boxes from pallets or lumber, each roughly 3 feet by 3 feet by 3 feet. As one chamber fills, you move material to the next, and by the time you return to the first, it is ready to use.

Layering, moisture, and turning

Start with a 4-inch layer of brown material on the ground to allow air flow underneath. Add a 4-inch layer of green material, then brown, then green, until your bin is full or you run out of material. Water each layer as you go so it is damp like a wrung-out sponge — not soggy, not dry.

Turn the pile every 7 to 14 days by moving material from the outside (cooler) to the center (hotter). Use a garden fork or shovel. Turning speeds decomposition by mixing materials and introducing oxygen. If you do not turn, the pile will still compost but will take twice as long. A tumbler does this work for you: rotate it every few days instead of turning by hand.

Check moisture weekly. If the pile smells sour or looks slimy, it is too wet — add brown material and turn it. If it is not heating up and smells musty, it is too dry — add water and turn it. A working pile should feel warm in the center, especially on cool days.

Knowing when your compost is finished

Finished compost looks like dark brown or black crumbly soil and smells earthy, not like rotting food. You should not be able to identify the original materials — everything should be broken down. If you see recognizable food scraps or leaves, it needs more time.

Screen finished compost through a half-inch mesh to remove chunks and return them to a new pile. Use the finished compost in garden beds, potted plants, or mixed into lawn soil. A 3-foot by 3-foot by 3-foot pile yields roughly 1 cubic yard of finished compost, enough to cover a 100-square-foot garden bed with 3 inches of material.

Troubleshooting common problems

Smell 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 compacted. Ammonia smell means nitrogen is escaping; turning releases it into the air instead of letting it build up.

Pile is not heating up: Not enough material, too much brown, or too dry. A pile needs at least 3 feet by 3 feet by 3 feet to generate heat. Add green material, water it, and turn it. In cold weather, a pile may not heat up at all — this is normal, and decomposition will resume in spring.

Rodents or insects in the bin: Do not add meat, dairy, or oils. Bury food scraps under 6 inches of brown material so they are not visible. Use hardware cloth to line the bottom and sides if rats are a persistent problem. A sealed plastic bin or tumbler prevents most pest access.

Compost is wet and slimy: Too much moisture or not enough air. Turn it, add brown material, and consider drilling holes in the bottom for drainage if water is pooling.

Compost systems that require no turning

A static pile (no turning) takes six to twelve months but requires no work after the initial build. Layer materials as usual, water it, and leave it. Decomposition happens from the outside in, so only the outer edges finish first — you harvest from the bottom and add new material to the top.

A bokashi bucket is a sealed container filled with food scraps and a special bran inoculant that ferments the material in two weeks. The result is not finished compost but a pre-compost that you bury in a garden bed or add to a regular compost pile to finish breaking down. Bokashi buckets cost $30 to $60 and work well for apartments or small spaces, but require buying replacement bran ($10 to $15 per bag).

Vermicomposting (composting with worms) happens in a bin indoors or outdoors and produces finished compost in three to six months with no turning. Red wiggler worms eat the scraps and produce castings (worm droppings) that are rich compost. A worm bin costs $40 to $150, and you need to buy worms ($30 to $50 for a starter batch). Worm bins work year-round indoors and produce almost no smell if managed correctly.

Frequently Asked Questions

Can I compost in an apartment or small space?

Yes. A bokashi bucket or worm bin works indoors with no smell if maintained properly. Both are compact, sealed, and produce finished compost or pre-compost in weeks to months. Bokashi is faster but requires buying bran; worms are slower but need only scraps and bedding.

How do I know if my compost is too wet or too dry?

Squeeze a handful. If water drips out, it is too wet — add brown material and turn. If it crumbles and does not hold together, it is too dry — add water and turn. It should feel like a wrung-out sponge: moist but not dripping.

What if I do not have space for a compost bin?

You can compost in a 5-gallon bucket with drainage holes drilled in the bottom, or in a large plastic storage container. Layer materials as usual, keep it moist, and turn it with a shovel or stick. It will take longer than a full-size pile but still produces compost in four to six months.

Can I add diseased plants or weeds with seeds to compost?

No. Home compost does not reach temperatures high enough to kill most pathogens or seeds. Diseased plants can spread disease to your garden when you use the finished compost. Weeds with seeds will germinate when you spread the compost. Bag these materials for trash or yard waste pickup instead.

How long does it take to get finished compost?

A hot pile turned weekly takes two to three months. A pile turned every few weeks takes four to six months. A static pile left alone takes six to twelve months. A tumbler takes six to eight weeks. Temperature, moisture, material size, and how often you turn all affect speed.