Start with a container and brown-and-green materials
A small compost bin needs three things: a container, dry materials (leaves, shredded paper, cardboard), and wet materials (food scraps, grass clippings, plant trimmings). You do not need to buy anything — a plastic storage bin with a lid, a wooden crate, or even a corner of your yard works. The container just needs to hold material while it breaks down.
Layer your materials as you add them: a few inches of brown (dry) material, then a few inches of green (wet) material, then brown again. This ratio matters more than the container itself. Too much green and your pile smells; too much brown and nothing happens. Aim for roughly three parts brown to one part green by volume.
Keep the pile as moist as a wrung-out sponge. If it dries out, decomposition slows. If it gets soggy, it will smell like ammonia or rotten eggs. Water it when the top feels dry, or add more green material if it is too dry.
Key Takeaways
- You can compost in a plastic bin, wooden box, or open pile — the container matters less than the mix of materials inside.
- Layer brown materials (leaves, cardboard, paper) with green materials (food scraps, grass) in a ratio of roughly three to one.
- Keep the pile as moist as a wrung-out sponge and turn it every week or two to speed decomposition.
- Finished compost looks like dark, crumbly soil and takes two to six months depending on how often you turn it and how small you chop the materials.
- Never compost meat, dairy, oils, or pet waste — these attract pests or introduce harmful bacteria.
What materials break down and what does not
Safe to compost: fruit and vegetable scraps, coffee grounds and tea bags, crushed eggshells, grass clippings, leaves, straw, hay, shredded newspaper, cardboard, wood chips, and plant trimmings. These materials will decompose in your bin.
Never compost: meat, fish, bones, dairy products, oils, fats, pet waste, diseased plants, or weeds with seeds. Meat and dairy attract rats and raccoons. Pet waste carries parasites. Diseased plants spread infection to your garden. Weeds with seeds will germinate in your finished compost.
Cooked food scraps are safe only if they contain no oil or meat — cooked vegetables and grains are fine, but cooked pasta with sauce or oily rice should not go in. Citrus peels, onions, and garlic are safe but use them sparingly because they can slow decomposition if they make up too much of the pile.
Choosing between a bin, tumbler, or open pile
A plastic storage bin is the cheapest start. Drill holes in the bottom and sides for air flow, fill it with layers, and turn it with a pitchfork or shovel every week or two. It keeps pests out and takes up little space. Finished compost is ready in two to three months if you turn it regularly.
A wooden bin or pallet box costs more to build but lasts longer and looks neater in a yard. Air flows through the slats naturally. You turn it the same way as a plastic bin. Expect the same timeline — two to three months with regular turning.
A compost tumbler is a drum on a stand that you rotate by hand. It speeds decomposition because turning is easier, so finished compost can be ready in six to eight weeks. Tumblers cost more upfront (usually $100 to $300) but save time and effort. They also keep pests out completely.
An open pile requires no container — just layer materials on the ground in a corner of your yard. It is free and takes up more space. Pests can access it more easily, and it takes longer (three to six months) because you are less likely to turn it regularly. This works if you have room and do not mind waiting.
Turning your pile and speeding up decomposition
Turning means mixing the pile from the outside in so that material at the edges moves to the center, where it is warmest and breaks down fastest. Turn your pile every week or two with a pitchfork or shovel. Each time you turn it, you add air, which bacteria need to work.
If you turn weekly, finished compost is ready in six to eight weeks. If you turn every two weeks, expect two to three months. If you do not turn at all, decomposition still happens but takes four to six months or longer.
You can speed things up by chopping materials into smaller pieces before adding them — smaller pieces have more surface area for bacteria to work on. A shovel or machete works; you do not need a shredder. Wet the pile lightly each time you turn it if it looks dry.
Knowing when your compost is finished
Finished compost looks like dark brown or black crumbly soil. You should not see the original materials — leaves, food scraps, and cardboard should be unrecognizable. It smells earthy, not like rotting food. If you squeeze a handful, it should hold together slightly but crumble apart easily.
If you still see large pieces of material, it is not ready. Put it back in the bin or pile and let it break down more. If it smells sour or like ammonia, it needs more brown material and more air — turn it and add shredded paper or leaves.
Once it is finished, use it in your garden beds, mix it into potting soil, or spread it on your lawn. It improves soil structure, holds water better, and feeds plants slowly over time. You can start a new batch in your bin while you use the finished compost.
Troubleshooting common problems
If your pile smells bad, it is too wet or has too much green material. Add brown material (leaves, cardboard, shredded paper) and turn it to add air. Reduce how much food scraps you add each week.
If nothing is breaking down and the pile looks the same after weeks, it is too dry or too brown. Water it and add more green material — grass clippings, food scraps, or plant trimmings. Turn it to mix the new material in.
If you see pests like rats or flies, you are composting something you should not — usually meat, dairy, or oily food. Stop adding those materials and bury any food scraps under at least six inches of brown material. A covered bin or tumbler prevents pests better than an open pile.
If your compost is taking longer than expected, turn it more often and chop materials smaller. Cold weather slows decomposition, so a pile started in fall will take longer than one started in spring or summer.
Where to put your bin and what space you need
Place your bin in a spot that gets some sun but is not in full heat all day — partial shade is ideal. Sun speeds decomposition but too much heat can dry the pile out. Avoid placing it directly against a fence or wall where air cannot flow around it.
A small plastic bin takes up about two square feet. A wooden bin or tumbler takes three to four square feet. An open pile can be any size but needs at least a three-foot square to hold enough material. Make sure you can reach it easily with a shovel or pitchfork to turn it.
Keep it away from your house if you are worried about smell or pests, but close enough that you will actually use it — if it is too far away, you will stop adding to it. Near a garden bed or vegetable patch is ideal because you can use the finished compost right there.
Frequently Asked Questions
Can I compost in an apartment or small space?
Yes. A small plastic bin under a sink or on a balcony works if you drill drainage holes and keep it covered. You can also use a bokashi bucket, which ferments food scraps in a sealed container using special bran — it takes up almost no space and produces finished material in two weeks that you can bury in a garden or potted plant.
How often should I add materials to my compost?
Add materials whenever you have them — there is no fixed schedule. Add food scraps as you cook, grass clippings when you mow, and leaves when they fall. The more often you add material and turn the pile, the faster decomposition happens. You can also save scraps in a bag and add them all at once.
Will my compost attract rats or raccoons?
Only if you compost meat, dairy, or oily food. If you stick to plant scraps and brown materials, and you bury food scraps under brown material, pests are unlikely. A covered bin or tumbler keeps them out completely. An open pile is riskier, especially if you live near woods or have other food sources nearby.
Can I use finished compost right away or does it need to age?
You can use it right away in gardens and potted plants. If it still has a strong smell or looks slightly wet, let it sit for a week or two before using it. Finished compost does not age or improve over time the way soil does — use it as soon as it is ready.
What if I do not have a yard — can I compost indoors?
A bokashi bucket or vermicompost bin (worm composting) works indoors because they are sealed and odor-free. Bokashi ferments scraps in two weeks, then you bury the material in a garden or large potted plant. Vermicompost uses red worms in a bin and produces finished compost in three to six months. Both take up minimal space.