Trench Composting
Method
Trench composting buries organic matter directly in the soil so it can decompose in place. It is a low-visibility method that can work well in vegetable gardens, ornamental beds, or future planting areas. Gardeners often use it when they want a simple way to return kitchen scraps to the soil.
How it works
Buried organic matter is broken down by soil microorganisms and invertebrates below the surface. The surrounding soil helps contain odors and moisture while keeping scraps out of sight. Decomposition is usually slower than active pile composting because aeration is lower. As the materials break down, nutrients and organic matter become incorporated into the soil.
Details
Dig a trench or hole in an area that will not be planted immediately and place the organic matter below the surface. Cover it fully with soil so scraps are not exposed to animals or drying air. Rotate burial spots through the garden to avoid concentrating fresh material in one place. Wait until the buried material has broken down before planting directly in that location.
Tips
Mark burial areas so you do not disturb them too soon. Chop scraps into smaller pieces if you want faster decomposition. Avoid adding materials that are slow to break down if you need to use the area soon.
General guidance for US home gardens. For local guidance and any rules on composting, contact your Cooperative Extension office. Page updated Aug 4, 2026.