Sheet / Lasagna Composting
Technique
Sheet, or lasagna, composting creates a new growing bed by layering organic materials directly on the soil. It is a practical no-dig approach for covering grass, improving bare ground and preparing a vegetable plot. The layers settle over time into a fertile surface, with soil organisms doing much of the mixing below.
How it works
Start by removing persistent perennial weeds where possible, then lay overlapping plain cardboard over the soil or closely mown grass. Wet it thoroughly so it lies flat. Add alternating layers of compostable greens, browns, well-rotted manure, leaf mould and finished garden compost, finishing with a planting layer of compost. The cardboard suppresses light and gradually breaks down, while worms draw organic matter into the soil. Build the bed in autumn for spring planting, or use shallow layers and plant through pockets of mature compost straight away. Avoid making any single wet layer too thick.
Details
Use tape-free cardboard and avoid glossy or plastic-coated packaging. A finished layer around 5 to 10 cm deep of mature garden compost is particularly useful for immediate sowing or planting. Do not use raw kitchen scraps near the surface, as they can attract vermin; compost them first or bury them properly in a trench. Keep meat, fish, dairy, cooked food and pet waste out of the bed. Check manure, hay and grass sources carefully: aminopyralid weedkiller residues may damage tomatoes, beans and potatoes. Renew the surface each year with compost, leaf mould and suitable mulches rather than digging it in.
Tips
Water each layer as you build, especially cardboard and dry straw, then cover the bed if heavy rain is forecast. Weight cardboard edges with compost so wind cannot lift them. For a lawn conversion, allow extra time before planting large-rooted crops, as the turf and cardboard need time to soften.
Sheet / Lasagna Composting: frequently asked questions
How does sheet / lasagna composting work?
Start by removing persistent perennial weeds where possible, then lay overlapping plain cardboard over the soil or closely mown grass.
What do I need to know about sheet / lasagna composting?
Use tape-free cardboard and avoid glossy or plastic-coated packaging.
What are some tips for sheet / lasagna composting?
Water each layer as you build, especially cardboard and dry straw, then cover the bed if heavy rain is forecast.
General guidance for UK gardens and allotments. Page updated 18 Sep 2026.