How to Compost Kitchen Scraps
4 min read
Composting sounds like something you need a big yard, special equipment, or a science degree to pull off. It really does not. If you cook with fresh produce, you already generate the raw material for good compost every single day. Those carrot tops, apple cores, and coffee grounds can turn into dark, crumbly soil that feeds your garden or your houseplants. This is a simple starter guide to composting kitchen scraps at home, whether you have a backyard or just a corner of a small apartment.
Why Bother Composting Scraps
When produce scraps go in the trash, they end up buried in a landfill where they break down slowly and release methane, a potent greenhouse gas. Composting lets those same scraps break down with air and turn into something useful instead. You get free soil conditioner, you cut down on trash and odor, and you close the loop on the fruits and vegetables you buy from your local farmers market.
What You Can and Cannot Compost
The easiest way to think about compost is a balance of two things: "greens" that are wet and rich in nitrogen, and "browns" that are dry and rich in carbon. A healthy pile wants roughly two to three parts browns for every part greens.
Good greens (wet, nitrogen):
- Fruit and vegetable peels, cores, and trimmings
- Coffee grounds and paper filters
- Loose tea and tea bags without staples
- Crushed eggshells
- Fresh grass clippings and green leaves
Good browns (dry, carbon):
- Shredded newspaper and plain cardboard
- Dry leaves
- Paper egg cartons torn into pieces
- Untreated sawdust or wood shavings
- Straw
Leave these out:
- Meat, fish, and bones
- Dairy and greasy or oily foods
- Pet waste
- Anything coated in plastic or heavily treated
Meat and dairy attract pests and create strong smells, so a starter home system is happier without them.
Setting Up Your First System
You do not need to buy anything fancy to begin. Pick the option that fits your space.
A backyard bin or pile
Choose a spot with decent drainage and some shade. You can build a simple pile directly on the ground or use a basic bin with air holes. Start with a layer of browns at the bottom, add your greens as you collect them, and cover each addition with more browns to control smell and flies.
A countertop collector
Keep a small lidded container by the sink to gather scraps through the day. Empty it into your main bin every couple of days. Rinsing it out keeps odors down. Some people keep this container in the freezer, which stops smells completely until you are ready to take it out.
Small-space and apartment options
No yard is fine. A worm bin, sometimes called vermicomposting, uses red wiggler worms to eat scraps in a compact container you can tuck under a sink or on a balcony. Many towns and some farmers markets also run drop-off programs where you can hand off a bag of frozen scraps and let someone else do the composting.
Keeping It Healthy
Compost wants three things: a mix of greens and browns, some air, and a little moisture.
- Chop scraps small. Smaller pieces break down faster than whole cores and rinds.
- Turn it now and then. Stir or turn the pile every week or two with a fork or shovel to add air and speed things along.
- Aim for a damp sponge. If the pile feels dry, add greens or a splash of water. If it feels soggy or smells sour, mix in more browns.
- Cover fresh scraps. Tucking greens under browns keeps flies and odor in check.
A well-tended pile smells earthy, not rotten. A bad smell almost always means too many wet greens or not enough air, and both are easy to fix.
Knowing When It Is Ready
Depending on your setup, the weather, and how often you turn it, finished compost can take anywhere from a couple of months to most of a year. You know it is done when it looks dark and crumbly, smells like fresh soil, and you can no longer pick out the original scraps. Spread it around garden beds, mix it into potting soil, or scatter a thin layer over your lawn.
Composting rewards patience more than perfection, so start small and adjust as you go. Once you get into the rhythm, you will look at every peel and core a little differently. If you want to keep buying the fresh produce that feeds your pile, use our directory to find a farmers market near you and check what is in season before you shop.