How to Start Composting at Home

Your living situation determines which composting method works best. If you have a yard, a tumbler or open bin is ideal. If you live in an apartment, a countertop electric composter or vermicomposting worm bin works in small spaces. A single tumbler or bin is plenty for a household of 2-4 people.

Place your compost bin on bare soil or grass if possible so worms and beneficial microbes can enter from below. Choose a spot with partial shade. Keep the bin within 30 feet of your kitchen door. Avoid placing it against wooden fences or structures, as moisture can cause rot.

Balance nitrogen-rich greens (food scraps, coffee grounds, grass clippings) with carbon-rich browns (dried leaves, cardboard, newspaper, straw). The ideal ratio is roughly 3 parts brown to 1 part green by volume. Never compost meat, dairy, oils, or pet waste. Eggshells are fine but crush them first.

Start with a 4-6 inch layer of coarse browns on the bottom for airflow and drainage. Add a 2-3 inch layer of greens on top, then another layer of browns. Aim for your initial pile to be at least 3 feet wide and 3 feet tall.

Your compost should feel like a wrung-out sponge, damp but not dripping. Too-wet compost goes anaerobic and smells like rotten eggs; too-dry compost stops decomposing. Check moisture every time you add new material.

Turning introduces oxygen for aerobic bacteria. For a standard bin, turn every 1-2 weeks. For a tumbler, give it 5-10 full rotations every 3-4 days. Hot composting produces finished compost in 4-8 weeks; cold composting takes 6-12 months but requires almost no effort.

Bad smell means too much nitrogen or too much moisture, add browns and turn. Fruit flies appear when food scraps are exposed, always bury greens under browns. If the pile is not heating up, it is likely too small, too dry, or lacking nitrogen.

Finished compost is dark brown to black, crumbly like soil, and smells earthy. It typically takes 2-6 months. To test readiness, put some in a sealed plastic bag for a week. Screen finished compost through half-inch hardware cloth to remove large chunks.

Mix finished compost into garden beds at 1-2 inches into the top 6 inches of soil. For lawns, spread a quarter-inch layer in spring or fall. For potted plants, mix with potting soil at roughly a 1:3 ratio. Never use unfinished compost on plants.