What You Need to Start Composting
You need three things to compost: a container, brown materials (dry leaves, shredded paper, cardboard), and green materials (food scraps, grass clippings, plant trimmings). The container can be as straightforward as a pile in your yard, a wooden bin you build yourself, or a purchased tumbler or stationary bin. Most people start with what they have on hand — a corner of the yard or a plastic storage bin with holes drilled in the bottom.
The brown-to-green ratio matters more than the container itself. Aim for roughly three parts brown to one part green by volume. Browns provide carbon and help air flow through the pile; greens provide nitrogen and moisture. Without enough brown material, your pile becomes wet and smelly. Without enough green material, decomposition slows to a crawl.
You do not need special tools, but a pitchfork or garden fork makes turning the pile easier if you choose to turn it. A thermometer designed for compost piles (around $10 to $20) helps you track whether the pile is hot enough to break down material quickly, though it is optional for beginners.
Key Takeaways
- Layer brown materials (leaves, cardboard, paper) with green materials (food scraps, grass) in roughly a 3-to-1 ratio by volume to create the right balance for decomposition.
- Food scraps that work include vegetable peels, fruit waste, coffee grounds, and eggshells; never add meat, dairy, oils, or pet waste.
- A compost pile or bin in a shaded spot with good drainage will break down material in two months to a year depending on how often you turn it and what you add.
- Finished compost looks like dark, crumbly soil and smells earthy; you can use it in garden beds, potted plants, or mix it into lawn soil.
- The simplest approach for beginners is a stationary pile or bin that you add to regularly without turning, which takes longer but requires almost no maintenance.
Which Food Scraps and Yard Waste Go In
Add vegetable peels, fruit scraps, coffee grounds (with or without the filter), tea bags, crushed eggshells, and plant trimmings. Grass clippings, leaves, small branches, and plant-based yard waste all break down. Avoid meat, fish, bones, dairy products, oils, fats, and pet waste — these attract rodents, create odors, or introduce pathogens that survive the composting process.
Citrus peels and onion skins can go in, but use them sparingly because they break down slowly and can repel worms if you are using a worm bin. Bread, pasta, and cooked vegetables are technically compostable but attract pests more readily than raw scraps, so many home composters skip them. Paper and cardboard (shredded or torn into pieces) count as brown material and break down over time.
Do not add diseased plants, weeds with seeds, or plants treated with pesticides unless you are certain the pile will reach temperatures above 140°F, which kills seeds and breaks down some chemicals. A beginner pile usually does not get that hot without active management.
Setting Up Your Pile or Bin
Choose a spot that gets partial shade and has good drainage — wet ground underneath will waterlog your pile. Full sun can dry it out too quickly; full shade slows decomposition. Start with a layer of brown material (shredded leaves, cardboard, or straw) about 4 to 6 inches deep. This creates air pockets at the base.
Add a layer of green material about 2 to 3 inches deep on top. Alternate brown and green layers as you add material. If you are using a bin, fill it until it is about three-quarters full, then let it sit. If you are building a pile, you can keep adding to it indefinitely, though many people find a pile about 3 feet by 3 feet by 3 feet works well — large enough to generate heat, small enough to manage.
Water the pile as you build it so that it feels like a wrung-out sponge — moist but not dripping. If rain is regular where you live, you may not need to water at all. If the pile smells like ammonia or rotten eggs, it is too wet or has too much green material; add brown material and turn it if possible.
Turning Your Pile Versus Letting It Sit
A turned pile breaks down material in two to three months because turning adds oxygen, which speeds decomposition. Every week or two, use a pitchfork to move material from the outside of the pile to the center, mixing it thoroughly. This is work, but it produces finished compost quickly.
A stationary pile that you straightforward add to without turning takes six months to a year or longer to fully decompose. You add scraps and brown material, water occasionally, and leave it alone. This requires almost no effort and works well for people with small yards or limited time. The trade-off is patience.
Most beginners do best with a stationary approach. Once you understand how the process works, you can experiment with turning if you want faster results. Some people use two bins — one they add to while the other finishes decomposing — so they always have finished compost available.
Recognizing Finished Compost and Using It
Finished compost is dark brown or black, crumbly, and smells earthy — like forest soil. You should not be able to identify the original materials. If you can still see food scraps or leaves, it is not ready yet. Finished compost is cool to the touch, whereas an active pile generating heat will be warm in the center.
Use finished compost by mixing it into garden beds before planting, layering it on top of soil around existing plants, or blending it into potting soil for containers. A typical garden bed benefits from 1 to 2 inches of compost worked into the top 6 to 8 inches of soil. You can also top-dress lawns with a thin layer of finished compost in spring or fall.
If your compost still has some partially decomposed material mixed in, that is fine — it will continue breaking down in the soil. Sift out the larger pieces and return them to your compost pile if you want a finer product, but it is not necessary.
Troubleshooting Common Problems
If your pile smells bad, it is usually too wet or has too much green material. Stop adding scraps for a week or two, add brown material, and turn the pile if you can. If it is dry and not decomposing, add water and green material. If it attracts rodents or insects, you are likely adding meat, dairy, or oily foods — remove those items and bury food scraps deeper in the pile under brown material.
If decomposition is very slow, check that you have enough green material and that the pile is moist. A pile that is too small (less than 2 feet on each side) may not generate enough heat to decompose quickly. Shredding or chopping materials into smaller pieces speeds breakdown because it increases surface area for microbes to work on.
Fruit flies can appear in warm months, especially if you add fruit scraps. Bury scraps under at least 4 inches of brown material so they are not exposed. If flies are already present, turn the pile to bury the top layer, or add a thick layer of leaves or cardboard on top.
Frequently Asked Questions
Can I compost in an apartment or small space?
Yes. A worm bin (also called vermicomposting) fits under a sink or in a closet and uses red wiggler worms to break down scraps. It produces finished compost in three to six months and has no smell if managed correctly. Alternatively, a small tumbler bin on a balcony works if you have outdoor space, though it needs regular turning to decompose quickly.
How long does it actually take to get finished compost?
A turned pile takes two to three months. A stationary pile takes six months to a year. A worm bin takes three to six months. The timeline depends on temperature, moisture, how finely you chop materials, and how often you turn the pile. Cooler seasons slow everything down.
Do I need to buy special compost starter or microbes?
No. Soil, finished compost, and yard waste already contain the microbes that decompose material. Commercial starters are unnecessary and do not speed the process meaningfully. Save your money.
What do I do with compost if I do not have a garden?
Give it to neighbors, community gardens, or local parks. Many gardeners welcome free compost. You can also use it in potted plants on a patio or balcony, or donate it to a school garden or food bank that maintains garden beds.
Can I compost sawdust or wood chips?
Yes, but only untreated wood. Sawdust from pressure-treated lumber or plywood contains chemicals that should not go in compost. Untreated sawdust and wood chips are brown material and break down slowly, so use them sparingly and be patient.