Compost Tumbler
Technique
A compost tumbler is an enclosed composting container that can be rotated to mix materials. It offers a tidy option for home gardeners who want easier turning and a contained system. Tumblers can work well for small to moderate amounts of compostable material.
How it works
Inside the chamber, organic materials decompose as microbes feed on them under moist, aerated conditions. Rotating the tumbler mixes wet and dry ingredients and brings air into the pile without hand turning. The enclosed design can help conserve moisture and limit direct contact with rain. Decomposition continues until the contents become dark, crumbly, and less recognizable.
Details
Add greens and browns in a balanced mix rather than filling the tumbler with one type of material. Keep the contents damp and rotate the chamber periodically so materials stay mixed and aerated. If the mixture becomes too wet, add dry browns before rotating again. Let partially finished material cure after active composting if it still contains visible pieces.
Tips
Avoid overfilling because packed contents do not mix or aerate well. Store some dry leaves or shredded paper nearby for quick moisture correction. A tumbler is easiest to use when it is located close to the garden or kitchen path.
General guidance for US home gardens. For local guidance and any rules on composting, contact your Cooperative Extension office. Page updated Aug 4, 2026.