How do I start a compost heap on an allotment?

Choose an accessible, sheltered spot and add a mix of soft green material and dry brown material. Keep the contents moist but not waterlogged, allow air into the heap and turn or mix it when practical.

Site the heap for regular use

The RHS recommends partial or full shade to avoid extremes of heat and moisture. A bin should exclude excess rain, retain some warmth, allow drainage and admit air. On a larger allotment, a timber bay can hold more material; several bays make it easier to separate new, maturing and ready compost.

Green ingredients include leafy crop waste, grass clippings and annual weeds. Browns include chopped woody prunings, straw, dead stems, shredded paper and plain cardboard. Avoid allowing one ingredient—especially wet grass clippings—to dominate.

Manage air and moisture

Mixing adds air and helps compacted material decompose. If the heap is wet and smelly, add brown material and protect it from rain. If it is dry and fibrous, add green material and water if needed. Chop bulky stems to speed their breakdown.