Start with a container and kitchen scraps
Home composting works by collecting food scraps and yard waste in a container where they break down into dark, crumbly material you can mix into garden soil. You do not need special equipment, a large yard, or experience. A plastic bin with a lid, a corner of your kitchen counter, and vegetable peels are enough to begin.
The simplest setup is a sealed plastic storage bin with drainage holes drilled in the bottom. A 10- to 20-gallon container works for most households. Place it on a tray or in a shallow pan to catch liquid that drains out—this liquid, called compost tea, can go down the drain or water your plants. If you do not have outdoor space, keep the bin under a sink, in a basement, or on a balcony.
Start collecting scraps when ready. Save vegetable and fruit peels, coffee grounds with their filters, crushed eggshells, and tea bags. These are your green materials—they are nitrogen-rich and break down quickly. Do not add meat, fish, dairy, oils, or pet waste, as these attract pests and create odor.
Key Takeaways
- A sealed plastic bin with drainage holes is the cheapest and easiest container for a beginner, and it fits in a kitchen, basement, or closet.
- Add layers of food scraps (green materials) and shredded paper or dry leaves (brown materials) in roughly equal amounts by volume.
- Stir the pile once a week and keep it as moist as a wrung-out sponge to speed decomposition without creating smell.
- Finished compost is dark, crumbly, and earthy-smelling, and takes four to six months in a sealed bin or two to three months if you turn it weekly.
- If your bin smells like ammonia or rotten eggs, add more brown materials and stir more often.
Layer green and brown materials in the right ratio
Compost breaks down fastest when you balance nitrogen-rich scraps with carbon-rich dry materials. Aim for roughly equal volumes of each—think of it as alternating layers in a lasagna. For every bucket of food scraps, add a bucket of shredded paper, cardboard, or dry leaves.
Brown materials include shredded newspaper, cardboard (torn into pieces), dry leaves, straw, and wood chips. Avoid glossy or colored paper, which may contain chemicals. Cardboard from food boxes works well; remove tape and staples first. If you do not have leaves on hand, shredded newspaper is free and always available.
The ratio matters because too many scraps without enough brown material creates a wet, smelly pile. Too much brown without scraps slows decomposition to a crawl. Start by adding a 2-inch layer of brown material to the bottom of your bin, then alternate 2-inch layers of scraps and brown material as you collect them. After a few weeks, you will develop a feel for the balance.
Keep moisture and air at the right levels
Compost needs moisture to break down, but too much creates odor and attracts pests. The pile should feel like a wrung-out sponge—damp throughout, but not dripping. If you squeeze a handful and water runs out, it is too wet; add more brown material and stir. If it feels dry, sprinkle water over the top layer.
Air is equally important. Stir the pile with a garden fork or shovel once a week, mixing the outside edges toward the center. This breaks up clumps, introduces oxygen, and speeds decomposition. If you skip stirring, the pile will still compost, but it will take twice as long. Sealed bins trap some air, so weekly stirring is essential to keep things moving.
In warm months (spring and summer), the pile heats up as microbes work. You may see steam rising when you open the lid—this is normal and a sign decomposition is happening fast. In cold months, the process slows dramatically. If you live in a cold climate, move your bin to a sheltered spot or insulate it with straw or leaves to keep it warmer.
Recognize when compost is ready to use
Finished compost looks like dark, crumbly soil and smells earthy, not sour or rotten. You should not be able to identify the original scraps or paper. In a sealed bin with weekly stirring, this usually takes four to six months. Without stirring, expect eight to twelve months.
When the pile shrinks to about one-third its original volume and the bottom layer is dark and fine-textured, it is ready to harvest. Scoop out the finished compost from the bottom and sides of the bin. Leave any unfinished material at the top and start a new batch on top of it. You can also sift the pile through a 1/4-inch screen (a piece of hardware cloth stretched over a wooden frame) to separate finished compost from chunks that need more time.
Use finished compost in garden beds, potted plants, or mixed into lawn soil. A typical household bin produces enough compost in six months to amend a small garden bed or fill several large pots. If you do not have a garden, compost makes an excellent gift to a neighbor or community garden.
Troubleshoot common problems
If your bin smells like ammonia or rotten eggs, the pile is too wet or has too many scraps relative to brown material. Open the lid to air it out, add a large handful of shredded paper or dry leaves, and stir thoroughly. Reduce how often you add scraps until the smell clears—wait three to four days between additions instead of daily.
If you see fruit flies or gnats, bury food scraps under a 2-inch layer of brown material instead of leaving them on top. Make sure the bin lid closes tightly. If flies are already present, add a layer of brown material over the entire pile and stir it in, then keep the lid closed except when adding new material.
If the pile is not heating up or breaking down after two months, it is likely too dry or too carbon-heavy. Sprinkle water over the top and stir, then add more food scraps. If you have been adding mostly leaves and paper, shift toward more scraps for the next few weeks.
Choose between sealed bins, open piles, and tumblers
A sealed plastic bin is the best starting point because it is cheap, compact, and controls pests and odor. But other methods work depending on your space and patience.
An open pile in a corner of the yard requires no container—just stack materials in a heap. It decomposes faster because air circulates freely, but it attracts more pests and takes up more space. You will need to turn it with a shovel every week or two to keep it moving. This method works well if you have a large yard and do not mind the appearance.
A compost tumbler is a sealed drum on a stand that you rotate by hand or crank. Turning is easier than shoveling, and decomposition is faster—often three to four months. Tumblers cost more than bins (usually $100 to $300) but are worth it if you plan to compost regularly and want finished material quickly.
Worm bins (vermicomposting) use red wiggler worms to break down scraps in a small container. They work indoors, produce finished compost in three to four months, and create no smell if managed correctly. They require more attention to moisture and temperature than a regular bin, so they are better for a second project once you understand the basics.
Decide what to add and what to avoid
| Add These | Avoid These |
|---|---|
| Vegetable and fruit scraps, peels, cores | Meat, fish, bones, or shellfish |
| Coffee grounds and tea bags (remove staples) | Dairy, cheese, butter, milk |
| Crushed eggshells | Oils, grease, salad dressing |
| Shredded newspaper and cardboard | Pet waste or litter |
| Dry leaves, grass clippings, straw | Diseased plants or weeds with seeds |
| Wood chips and sawdust (untreated) | Glossy or colored paper, magazines |
The rule is straightforward: add only plant-based materials and paper. Meat and dairy break down slowly, smell terrible, and attract rats and flies. Oils and grease coat the pile and prevent air from reaching the center. Pet waste contains harmful pathogens and should never go in compost you plan to use on food gardens.
Grass clippings are excellent if they come from a lawn that has not been treated with pesticides or herbicides. If you are unsure, skip them. Diseased plants and weed seeds can survive the composting process and spread problems to your garden, so leave those out too.
Frequently Asked Questions
Can I compost in an apartment or small space?
Yes. A sealed 10-gallon plastic bin fits under a kitchen sink or in a closet. Keep the lid closed and stir weekly to prevent odor. If space is extremely tight, a worm bin takes up even less room and produces no smell. Both work indoors year-round.
How long until I have compost I can use?
In a sealed bin with weekly stirring, four to six months. Without stirring, eight to twelve months. A tumbler or open pile with regular turning can finish in two to three months. The warmer your climate, the faster the process.
What if my compost smells bad?
Bad smell means too much moisture or too many scraps. Add shredded paper or dry leaves, stir thoroughly, and reduce how often you add new scraps. Open the lid to air it out. The smell should clear within a few days.
Do I need to buy special compost starter or microbes?
No. Microbes are already present in food scraps, soil, and yard waste. Commercial starters are unnecessary and do not speed decomposition meaningfully. Save your money and let the natural process work.
Can I compost cooked food or leftovers?
Cooked vegetables without oil or meat are fine. Cooked food with oil, butter, or meat should be avoided because it attracts pests and creates odor. When in doubt, leave it out and stick to raw scraps.