Composting turns kitchen scraps and yard waste into dark, crumbly soil food. It cuts down what you send to the landfill and gives your garden a free, natural fertilizer. For beginners, the process is simple: mix the right ingredients, keep them moist and aerated, and let nature do the work. Here is how to start your first compost pile or bin.
What You’ll Need
- A compost bin or a designated spot in your yard (a simple wire cage or a plastic bin with holes works fine)
- Brown materials: dry leaves, straw, shredded cardboard, paper, or wood chips
- Green materials: fruit and vegetable scraps, coffee grounds, fresh grass clippings, plant trimmings
- A garden fork or shovel for turning
- A water source or a watering can
- A small kitchen pail to collect scraps
Step-by-Step
- Choose a location. Pick a level, well-drained spot in your yard. Partial shade is ideal—it keeps the pile from drying out too fast in summer and stays warm enough in winter. If you use a bin, place it directly on soil so worms and microbes can get in.
- Set up your bin or pile. If you’re using a store-bought bin, follow the assembly instructions. For a DIY pile, simply mark out a space about three feet square. Loosen the soil underneath with a fork to improve drainage and aeration.
- Add a base layer of browns. Start with a few inches of coarse brown material like twigs or straw. This helps air circulate at the bottom.
- Add greens and browns in layers. Aim for roughly two to three parts browns to one part greens by volume. Alternate layers: a few inches of green scraps, then a few inches of browns. This balance keeps the pile from getting too wet or too dry.
- Chop or shred large pieces. Cut up thick stalks, melon rinds, and cardboard into smaller chunks. Smaller pieces break down faster and make the pile easier to turn.
- Keep it moist. The pile should feel like a wrung-out sponge—damp but not dripping. Water each layer as you build it, especially if your browns are dry. In dry weather, check weekly and add water if needed.
- Turn the pile every week or two. Use a fork to mix the outer layers into the center. This adds oxygen, which speeds up decomposition and prevents odors. If you have a tumbler, give it a spin a few times a week.
- Monitor the temperature. A healthy pile heats up in the middle—you may see steam on cool mornings. It should feel warm to the touch after a few days. If it’s not heating, add more greens or turn it more often.
- Wait for it to finish. Depending on conditions, compost can be ready in a few months to a year. You’ll know it’s done when it looks dark, crumbly, and smells earthy. The original materials should be unrecognizable.
- Use your compost. Mix it into garden soil, spread it as mulch, or brew it into compost tea. Avoid planting seeds directly in pure compost—it can be too strong. Blend it with soil or use it as a top dressing.
Common Mistakes
- Too many greens. A pile that’s mostly kitchen scraps and grass gets slimy and smells like rotten eggs. Add more browns to fix it.
- Too many browns. If the pile is dry and just sits there, it’s too woody. Add greens and water.
- Adding the wrong items. Meat, dairy, oils, and pet waste attract pests and can smell bad. Stick to plant-based scraps.
- Letting it dry out. A dry pile stops decomposing. Water it regularly, especially in summer.
- Not turning. Without oxygen, the pile goes anaerobic and smells. Turn it more often.
- Adding weeds with seeds. Some weed seeds survive the compost process and sprout in your garden later. Avoid or hot-compost them.
Tips
- Keep a small pail in your kitchen for scraps, and empty it into the compost every day or two to avoid fruit flies.
- Layer as you go: after adding a bucket of greens, cover it with a few handfuls of browns. This keeps smells down and balances the pile.
- Crush eggshells before adding—they break down faster and add calcium.
- In winter, keep a pile of chopped browns nearby to cover kitchen scraps. The pile may slow down but will resume in spring.
- If you have too many grass clippings, spread them out to dry before adding, or mix them well to avoid clumping.
- Use a compost thermometer to track progress, but your hand works fine—a warm center means active decomposition.
Troubleshooting
- Bad smell (like rotten eggs): Too wet or too many greens. Turn the pile and add dry browns like leaves or shredded paper. Make sure there’s no standing water.
- Pile is not heating up: Not enough nitrogen or too small. Add green materials (grass, food scraps) and make sure the pile is at least three feet in each dimension. Turn it to add oxygen.
- Pile is dry and crumbly: Water it thoroughly, turning as you go. Add fresh greens if it’s mostly browns.
- Pests like rats or flies: Stop adding food scraps uncovered. Bury greens deep in the pile and cover with browns. If you have a bin, make sure the lid fits tightly. Avoid meat and dairy.
- Compost is taking too long: Chop materials smaller, turn more often, and check the moisture. A balanced ratio of greens to browns is key.
- Fruit flies: Cover new scraps with a layer of browns immediately. You can also set a trap with apple cider vinegar in a jar.
Frequently Asked Questions
Can I compost in winter? Yes, but the pile slows down. Keep adding scraps and cover them with browns. It will freeze, then resume activity when the weather warms.
What can I put in compost? Fruit and vegetable scraps, coffee grounds, tea bags, eggshells, grass clippings, leaves, straw, shredded newspaper, cardboard, and plant trimmings. Avoid meat, dairy, oils, and diseased plants.
How long does it take to make compost? It can take anywhere from a couple of months to a year, depending on the size of the pile, the materials, and how often you turn it. A hot, well-managed pile is faster.
Do I need worms? No, but worms help speed things up. They often find their way into outdoor piles naturally. If you want to compost indoors, you can start a worm bin with red wigglers.
Can I compost weeds? Yes, but only if your pile gets hot enough to kill the seeds. If you’re unsure, avoid weeds that have gone to seed, or let them dry in the sun before adding.
How do I know when compost is ready? It should look dark, crumbly, and smell like earth. The original materials should be unrecognizable. If it’s still chunky, give it more time.