Glossary

Compost

Compost is decomposed organic matter, such as food scraps, fallen leaves, and grass clippings, that breaks down into a dark, crumbly material used to enrich soil and feed plants.

2 min read

Compost is the dark, crumbly material left after organic waste breaks down. It forms when food scraps, leaves, grass clippings, and other plant matter decompose with the help of microbes, fungi, and insects. Gardeners mix it into soil to add nutrients, improve texture, and feed the living organisms that keep soil healthy.

People often confuse compost with mulch, but they do different jobs. Compost goes into the soil to enrich it, while mulch sits on top to hold moisture and block weeds. Finished compost also differs from raw kitchen waste: it has fully broken down, smells earthy rather than rotten, and no longer resembles the scraps that went in.

In a backyard project, compost usually starts in a bin or pile in a corner of the yard, where clippings and kitchen scraps are layered and turned over a few months. The finished material gets worked into garden beds, spread around shrubs, or blended into the fill for a new planting area. Many homeowners keep a small bin going year-round so they always have a supply on hand.

For a homeowner or contractor, compost is one of the cheapest ways to improve poor soil. It loosens heavy clay, helps sandy soil hold water, and cuts the need for bagged fertilizer. Healthier soil means plants establish faster, need less watering, and look fuller, which lowers long-term upkeep and cost.

Compost works alongside other soil practices in a yard. It pairs well with mulch on top, gives a strong base for a raised garden bed, helps balance soil pH over time, and supports native plants that thrive in healthy ground.

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