The simplest way to start composting

You can build a working composter from materials you likely have around your house — a plastic storage bin with a lid, a wooden pallet frame, or even a wire cylinder. The easiest route for beginners is a sealed plastic bin, which takes about 15 minutes to set up and costs nothing if you reuse a container you already own. A bin keeps pests out, speeds decomposition by trapping heat, and fits in a garage, basement, or small yard.

The core idea is the same for any design: create a container that holds food scraps and yard waste, allow air to reach the pile, and let microbes break it down over weeks or months. You do not need special equipment or a large space. A bin composter produces finished compost in 2 to 6 months, depending on how often you turn the pile and what you add to it.

Key Takeaways

  • A plastic storage bin with drainage holes drilled in the bottom and lid is the fastest composter to build and requires no tools beyond a drill.
  • Layer food scraps with dry materials like shredded paper or leaves in a ratio of roughly one part food to two parts dry matter to prevent odor and speed decomposition.
  • Drill or poke air holes in the sides and bottom of your bin so oxygen reaches the pile, which microbes need to break down waste.
  • Turn the pile every 1 to 2 weeks by mixing the contents with a shovel or pitchfork to speed the process and prevent matting.
  • Finished compost looks like dark, crumbly soil and smells earthy; you can use it in gardens, potted plants, or lawn top-dressing within 2 to 6 months.

Building a plastic bin composter

Start with a plastic storage bin at least 18 inches tall and wide — a 20-gallon or larger container works well. Drill or poke holes in the bottom for drainage and around all four sides, spaced about 4 inches apart. The holes let water drain out and air flow through. If you do not have a drill, use a heated nail or a screwdriver to poke holes; aim for at least 20 to 30 holes total.

Place the bin on a pallet, concrete pad, or wooden frame so air can reach the bottom holes. If the bin sits directly on soil or grass, the bottom holes will clog. Drill a few holes in the lid as well so air enters from the top. You now have a working composter.

If you want to avoid drilling, buy a plastic bin with a spigot already installed at the bottom — these are sold as compost bins at garden centers — or stack two bins and cut a hole in the bottom of the upper bin so it drains into the lower one.

Layering food scraps and dry materials

Start with a 4-inch layer of dry material on the bottom: shredded newspaper, cardboard, dry leaves, or straw. This creates air pockets and prevents the pile from becoming a wet, smelly mat. Add food scraps on top — vegetable peels, fruit scraps, coffee grounds, eggshells — then cover with another 2 to 4 inches of dry material. Repeat this layering pattern each time you add scraps.

Keep the ratio roughly one part food scraps to two parts dry material by volume. Too much food without dry matter causes odor and attracts pests. Too much dry material slows decomposition. A good rule: if your pile smells like rotten food, add more dry material. If it is not breaking down after a month, add more food scraps or turn it more often.

Never add meat, fish, dairy, oils, or pet waste to a home composter. These attract rodents and create odor problems. Avoid diseased plants and weeds with seeds, which may survive the composting process.

Turning the pile to speed decomposition

Microbes work fastest when the pile is moist and has plenty of oxygen. Turn the pile every 1 to 2 weeks by mixing the contents with a shovel or pitchfork, moving material from the outside edges toward the center. This breaks up matted layers, introduces fresh air, and moves cooler material into the hot center where decomposition happens fastest.

If you turn weekly, you can have finished compost in 4 to 8 weeks. If you turn less often or not at all, decomposition takes 3 to 6 months. A pile that is not turned will still compost — it just takes longer. If you prefer not to turn, choose a larger bin or build a three-bin system where you move material from one bin to the next every few weeks.

Keep the pile as moist as a wrung-out sponge. If it is too dry, decomposition slows. If it is too wet, it smells and attracts pests. Water it lightly when you turn it, or let rain do the work if your bin is outdoors.

Building a wooden pallet composter

If you have access to wooden pallets, you can build a straightforward frame composter in about an hour. Stack four pallets into a square or rectangle and find the corners with wire, zip ties, or bolts. Lay cardboard or hardware cloth on the bottom to prevent rodents from burrowing in. You can attach a pallet to one side with hinges to create a door for straightforward access when removing finished compost.

A pallet composter is larger than a bin and holds more material, so it heats up faster and decomposes material more quickly. The open sides allow more air flow, which speeds the process. The trade-off is that it is less contained — pests and weather can reach the pile more easily — so keep it covered with a tarp or plywood lid.

Make sure the pallets are untreated wood, not chemically treated for shipping. Treated pallets are stamped with "HT" (heat-treated) and are safe; avoid pallets marked "MB" (methyl bromide), which is a pesticide.

Building a wire cylinder composter

Roll a length of wire fencing or chicken wire into a cylinder about 3 feet tall and 3 feet in diameter, and find the ends with zip ties or wire. Line the inside with cardboard to slow water loss and keep material from falling through. This design is fast and cheap — you need only fencing and zip ties — and the open sides let air reach the entire pile.

A wire composter works best if you turn the pile frequently, because the sides do not contain material as well as a bin or pallet frame. It is ideal if you have a large yard and do not mind the pile being visible. You can remove the cylinder and move it aside to access finished compost at the bottom, then rebuild it around the remaining material.

Monitoring and harvesting finished compost

Finished compost looks dark brown or black, crumbles easily in your hand, and smells earthy — like forest soil. You should not see recognizable food scraps or leaves. If your pile still has visible chunks after 2 months of regular turning, it needs more time or more frequent turning.

You can harvest compost in two ways. If your bin has a door or spigot at the bottom, remove finished compost from the bottom while fresh material continues to break down above. If your bin is solid, remove the entire pile, sift out finished compost from the top and sides, and return unfinished material to the bin to continue composting.

Use finished compost to amend garden beds, mix into potting soil, or spread as a top-dressing on lawns. A typical bin composter produces 1 to 2 cubic feet of finished compost per month once it is running steadily.

Frequently Asked Questions

Can I use a composter indoors or in an apartment?

Yes, if you use a sealed plastic bin with a tight-fitting lid and drill plenty of air holes. Keep it in a basement, closet, or garage where odor is not a problem. Worm composting (vermicomposting) in a small bin under a sink or in a closet is another option for apartments. Both methods produce little to no smell if maintained correctly.

How do I prevent fruit flies and rodents?

Bury food scraps under at least 4 inches of dry material so they are not exposed. Keep the bin sealed or covered. Never add meat, fish, or dairy. If flies appear, add more dry material and turn the pile. For rodents, use a bin with a solid bottom or line a pallet composter with hardware cloth (quarter-inch mesh).

What if my composter smells bad?

A rotten-egg or ammonia smell means too much food and not enough dry material. Add shredded paper, leaves, or cardboard and turn the pile. A sour smell means the pile is too wet and needs more air — turn it and add dry material. A working composter should smell earthy, not foul.

Can I compost in winter?

Decomposition slows in cold weather but does not stop. A pile in a sealed bin or insulated bin will continue to break down slowly. In very cold climates, move your bin into a garage or basement, or wait until spring to add new material and let the existing pile finish over winter.

How much space do I need for a composter?

A plastic bin composter needs only a 2-by-2-foot footprint. A pallet composter needs about 4-by-4 feet. A wire cylinder needs 3-by-3 feet. All can fit in a corner of a yard, garage, or basement. Even a small balcony can hold a sealed bin composter.