Fixing Rock-Hard Compacted Soil in London for a New Lawn

Test Soil First

Get a soil test from your local agricultural department. London clay compaction requires structural amendment, not just tilling.

Amendment Recipe

Mix coarse sand and compost 50:50, add gypsum, and incorporate into a 2-inch layer. Level and ensure drainage. Then seed with locally adapted grass or lay sod.

Why This Works

Sand improves porosity, compost adds organic matter and microbes, gypsum flocculates clay. Together they create friable, root-friendly soil.