How to Compost: 5 Steps to Make Great Compost

The short answer: Choose a partially shaded spot, mix green and brown materials, keep the compost moist and well aerated, turn it, and let it mature. After six to twelve months, the crumbly compost is ready to use.

Composting kitchen and garden waste at home turns it into valuable humus. Finished compost improves soil structure, helps it retain water, and supplies nutrients to plants. With the right location and mix of materials, the waste breaks down without unpleasant odors.

How do you set up a compost pile properly?

A good compost pile starts with the right location. It needs air, moisture, and enough room for mixing. Choose a partially shaded, sheltered spot with easy access from the garden and kitchen.

The location affects decomposition

An open compost pile sits directly on bare soil. Earthworms, woodlice, and microorganisms can reach the material, while excess water drains away. Compacted surfaces such as concrete or asphalt slow this natural exchange and can encourage rot when wet.

Avoid a deep hollow where water can collect. A spot beneath a tree with a light canopy, or on the north or east side of a building, protects the pile from strong midday sun. Otherwise, it can dry out quickly in hot weather. During extended rainy periods, a loose covering of branches or a breathable lid can help.

Which shape is right for your garden?

An open compost pile works well for larger amounts of leaves, grass clippings, and pruning waste. A closed bin contains kitchen scraps and looks tidier in a small garden. For a small to medium-sized garden, a tumbling composter such as

Lifetime Double-Barrel Composter 380 L 160×79×110 cm Brown – 2 Drums for Continuous Composting

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When setting up a compost pile, first make a loose base from thin branches or coarse wood chips. This layer lets air reach the pile from below. Then alternate moist and dry materials. Don’t press the layers down firmly.

• Prepare the ground: Loosen the top few centimeters of soil and remove dense grass.
• Add the base: Make a layer around ten centimeters high from branches, perennial stems, or wood chips.
• Mix the materials: Don’t stack kitchen scraps, grass clippings, leaves, and woody materials in thick, separate layers.
• Keep the edges clear: Leave enough space around the compost for turning and inspection.
• Check the cover: Protect the pile from heavy rain without blocking airflow.

Which waste belongs in a garden compost pile?

Good garden compost needs a balanced mix of nitrogen-rich and carbon-rich materials. Fresh, moist materials provide nitrogen and fuel decomposition. Dry, woody materials provide carbon, loosen the pile, and keep the contents from clumping together.

How to mix green and moist materials

Green materials aren’t always green; they’re generally moist and rich in nutrients. Add kitchen scraps to the pile in small amounts, and cover each fresh layer with dry material. This helps keep flies away and prevents the surface from drying out.

• Raw fruit and vegetable peelings, plus small amounts of fallen fruit
• Coffee grounds and paper filters, tea leaves, and tea bags without plastic
• Grass clippings, wilted flowers, weeds without seeds, and fresh perennial trimmings
• Fine plant waste from the vegetable garden
• Crushed eggshells as a slow-release source of lime

Brown materials include dry leaves, shredded branches, straw, wood chips, and shredded uncoated cardboard. Oak, walnut, and sycamore leaves break down more slowly. Shred them or mix them with materials that decompose more easily.

What should you keep out of an open compost pile?

Meat, fish, bones, dairy products, and cooked food can attract animals and spread pathogens. Cat litter, diapers, glass, metal, plastic, and treated wood also don’t belong in garden compost.

Leave out diseased plants and weeds with mature seeds if your pile doesn’t reach a reliably high composting temperature. Small home gardens don’t consistently generate enough heat. Dispose of this waste in your food waste bin or at a recycling center. For suitable bins and accessories, browse the Garden + Outdoor category and Garden equipment.

How do you manage moisture and airflow in compost?

The microorganisms in compost need both water and oxygen to stay active. A waterlogged pile breaks down without enough oxygen, while a dry pile stops decomposing. Check both regularly, especially after extended periods of rain or heat.

The squeeze test shows if moisture is right

Take a handful of material from the middle of the pile and squeeze it. If it feels like a wrung-out sponge, the moisture level is right. If water drips out, mix in dry leaves, cardboard, or wood chips. If the sample crumbles into dust, water it sparingly and spread the water through the pile as you turn it.

Don’t water only the surface. Loosen the pile first, then moisten dry layers evenly. Rainwater works well. After heavy rain, a loose cover that lets air circulate while keeping out more water can help.

Oxygen prevents composting problems

Grass clippings and wet kitchen scraps can quickly clump together. Mix them with around two parts dry structural material. Chopped branches create air pockets that let air circulate. Cut up whole branches or very coarse stems first.

• A rotten or sulfur-like smell indicates a lack of oxygen.
• Lots of flies on the surface suggest that kitchen scraps have been left uncovered.
• A dusty, warm surface indicates a lack of water.
• Very slow decomposition is often caused by materials that are too coarse or too dry.

“Compost is a valuable soil improver and fertilizer.”

When should you turn the compost?

Turning the compost introduces oxygen into the center of the pile and moves material from the outside into the warmer zone. This speeds up decomposition and balances moisture and temperature. A small compost pile does not need turning every time you add kitchen scraps, but thorough mixing at regular intervals is worthwhile.

The right time

Check the pile after two to four weeks. If the center feels warm, decomposition is active. Turn the compost as soon as the temperature drops or dry and wet areas begin to form. In spring and summer, turning every four to eight weeks is often sufficient. In winter, decomposition usually takes longer.

How to mix the pile

1. Set aside an empty space or place a second container next to the compost.
2. Lift material from the outside toward the center and break up any compacted clumps.
3. Move dry areas from the edges into the moist center.
4. If the pile is wet, mix in dry structural material; if it is dry, add a little water.
5. Put the loosened compost back together and cover it loosely.

Use a sturdy fork or compost aerator. With the right garden tools, you can work more comfortably and reach the lower layers. Remove coarse branches, pieces of plastic and other foreign materials as soon as you spot them while turning the compost.

Two chambers keep compost production going

If you want to harvest compost regularly, a two-chamber system can help. Older material matures in one chamber while you fill the other with fresh material. A dual-chamber composter such as

Lifetime Composter Compost Twin 380 L 143,5×79,4×110,4 cm Black – 2 chambers for continuous composting

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Fill one chamber at a time and leave the second one closed while the compost matures. After removing the finished compost, sift it and return any coarse pieces to the active chamber. This approach keeps the composting cycle organized.

How can you tell when compost is ready?

Mature compost is dark brown to almost black, loose and crumbly. It smells earthy, not rotten or like ammonia. You may still see individual thin leaf veins, but you should no longer be able to clearly identify kitchen scraps, grass clippings or plant stems.

The maturity and sieve test

Put a handful of compost into a sieve. Coarse branches and undecomposed peelings will remain. Return these pieces to the active compost pile. You can work the fine material directly into garden beds.

For a simple maturity test, squeeze some compost in your hand, then release it. Mature compost holds together briefly and crumbles again when touched lightly. If it remains slimy or smells pungent, it needs more air, structural material and time.

How do you use compost in the garden?

Use mature compost as a soil improver, not as a complete replacement for garden soil. Work it into the top layer of soil in spring or fall. A thin layer is usually enough because compost contains concentrated nutrients and supports soil organisms over the long term.

• Vegetable beds: Mix mature compost into the surface of the soil before planting.
• Perennials and shrubs: Spread the compost as a thin mulch layer and keep it away from plant stems.
• Lawn: Sift the compost finely and spread it in a thin layer so the grass does not suffocate.
• Containers and propagation: Mix compost with garden soil or a suitable growing medium. Do not use it on its own for sensitive seedlings.

A humus brick such as

Humus Brick

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“Mature compost smells earthy and has a crumbly structure.”

The five-step checklist

Check your garden compost before every major addition. This helps you spot problems early and adjust the mix before unpleasant smells or decomposition problems develop.

• The location is partially shaded, sheltered from the wind and not prone to waterlogging.
• Moist kitchen and plant waste alternates with dry structural material.
• The pile feels damp, like a wrung-out sponge.
• When turned, the material remains loose and well aerated.
• The finished compost is dark, crumbly and smells earthy.

With these five steps, you can turn garden and kitchen waste into valuable humus every year. Composting closes nutrient cycles, reduces trips to dispose of waste and improves the soil over the long term.

Frequently Asked Questions

What can I put in a compost pile?

Raw fruit and vegetable scraps, coffee grounds, tea bags without plastic, leaves, grass clippings, shredded branches, and untreated plant material can all go in the compost. Mix moist kitchen scraps with dry, bulky materials. Meat, fish, cooked food, diseased plants, and treated wood don’t belong in an open compost pile.

How moist should a compost pile be?

A compost pile should feel like a wrung-out sponge: moist but not soggy. If water drips out, mix in dry leaves, straw, or cardboard. If the pile is bone dry, water it sparingly and loosen any compacted areas. Check the moisture level regularly, especially in summer.

How long does it take for compost to mature?

Depending on the materials, season, and care, compost is usually ready after six to twelve months. Coarse materials and a pile that is rarely turned take longer. Finished compost is dark brown, crumbly, and earthy-smelling. Sift out any unfinished pieces and return them to the pile.

Can I put grass clippings in the compost?

Grass clippings can go in the compost as long as you add them in thin layers. A thick, wet layer clumps together, develops an unpleasant smell, and keeps oxygen from reaching the compost. Spread the clippings out to dry or mix them with leaves, wood chips, straw, or shredded branches. This keeps the compost pile loose.

What should I not put in the compost?

Meat, fish, bones, dairy products, cooked food, cat litter, diapers, glass, metal, plastic, and treated wood don’t belong in an open compost pile. Leave out diseased plants and weeds with seeds, too, if the pile doesn’t reliably reach the high temperatures needed for hot composting. Use your local food scraps collection or recycling center instead.