How Much Lime for 1,000 sq ft Clay Lawn from pH 5.5 to 7.0?
Calculate the lime needed to raise a 1,000 sq ft clay lawn from an acidic 5.5 to a near-neutral 7.0.
How to use this tool
- Get a soil test to find your current pH (kits available at garden centres).
- Enter current pH, target pH, and soil type.
- Enter your lawn area in square feet.
- The calculator returns pounds of ground limestone to apply.
Raising clay soil pH from 5.5 to 7.0 requires a significant lime application — get the exact pounds for your 1,000 sq ft lawn.
Frequently asked questions
- How much lime do I need to raise soil pH?
- The amount depends on soil type and the desired pH change. Sandy soils need less lime (≈40 lbs per 0.5 pH unit per 1,000 ft²); clay soils need more (≈50 lbs). Always confirm with a soil test.
- How often should I lime my lawn?
- Test your soil every 2–3 years. Most lawns in humid climates need liming every 2–3 years to maintain a pH of 6.0–7.0. Apply lime in fall for spring availability.