How to Start Composting at Home
Composting turns kitchen scraps and yard waste into dark, crumbly, nutrient-rich soil — the best free fertilizer a garden can get. It's easier than most people think, and once you understand the basic balance, it nearly runs itself.
- Compost needs a balance of “greens” (nitrogen) and “browns” (carbon).
- Aim for roughly two to three parts browns to one part greens.
- Keep the pile as moist as a wrung-out sponge and turn it occasionally.
- Avoid meat, dairy, and oily foods, which attract pests and smell.
Understand greens and browns
Composting is just managing the work of natural decomposers, and they need two kinds of ingredients. “Greens” are nitrogen-rich materials like fruit and vegetable scraps, grass clippings, and coffee grounds. “Browns” are carbon-rich materials like dry leaves, shredded paper, cardboard, and straw. A healthy pile uses about two to three parts browns for every part greens.
Choose a system
You don't need a fancy bin. A simple open pile in a corner of the yard works, though an enclosed bin looks tidier and keeps pests out. For small spaces, a tumbler or a worm bin fits on a patio or balcony. Whatever you choose, place it somewhere convenient — the easier it's to reach, the more likely you're to keep feeding it.
Build the pile
Start with a layer of coarse browns like twigs or straw for airflow, then alternate layers of greens and browns as you add material. Bury food scraps under a layer of browns to discourage flies and odors. Chopping scraps into smaller pieces speeds decomposition, but it isn't required — nature will break it down either way.
Keep it moist and aerated
A compost pile should feel about as damp as a wrung-out sponge. If it's too dry, decomposition stalls; if it's soggy, it turns smelly and anaerobic. Turn the pile with a fork every week or two to add oxygen, which the microbes need to work. A well-aerated pile breaks down faster and smells earthy rather than rotten.
Know what to avoid
Skip meat, bones, dairy, and oily foods, which attract pests and break down slowly. Also avoid diseased plants, weeds that have gone to seed, and pet waste. Sticking to plant-based scraps and yard waste keeps the pile simple, safe, and pleasant to manage.
Know when it's ready
Finished compost looks and smells like rich, dark earth — crumbly, sweet-smelling, and free of recognizable food scraps. It'll have cooled from the warm, active stage and be full of earthworms. If you can still identify the original ingredients, it needs more time.
Use finished compost by spreading it over garden beds as a top-dressing, mixing it into planting holes, or adding it to potting mixes. A little finished compost goes a long way, and it's the payoff for all those scraps you saved.
What you can and can't compost
Knowing what belongs in the pile keeps composting simple. Compost fruit and vegetable scraps, eggshells, coffee grounds, tea bags, grass clippings, dry leaves, and plain paper or cardboard. These break down cleanly and build good compost.
Keep out meat, bones, dairy, oils, and pet waste, which attract pests and create odors. Sticking to plant-based material makes the pile easy to manage and pleasant to be around.
Use finished compost well
Spread finished compost over garden beds as a top-dressing, mix a handful into each planting hole, or blend it into potting mixes. It improves soil structure, feeds plants slowly, and helps retain moisture. A little good compost used regularly does more for a garden than almost any store-bought product.
Turn the pile for faster compost
Turning the pile every week or two adds oxygen, which the decomposing microbes need, and speeds the whole process. A pile that's turned regularly breaks down noticeably faster than one left alone. Even occasional turning helps, so do it whenever you remember.
Frequently asked questions
How long does compost take to be ready?
Depending on the system and how often you turn it, compost can be ready in as little as a few months or as long as a year. Finished compost is dark, crumbly, and smells like fresh earth.
Why does my compost pile smell bad?
A rotten smell usually means too many greens, too much moisture, or not enough air. Add more browns, turn the pile to aerate it, and make sure it isn't soggy.
Can I compost in an apartment?
Yes. A small worm bin or an enclosed countertop composter works indoors, and many communities offer compost drop-off programs. You don't need a backyard to keep food scraps out of the trash.