Soil Amendment Calculator
Calculate how much lime, sulfur, compost, and fertilizer your garden soil needs.
Inputs
sq ft
%
Results
Lime Needed
5 lbs
Sulfur Needed0 lbs
Compost Needed3 cu ft
Fertilizer (10-10-10)2 lbs
Estimated Cost$17.5
How to Use This Calculator
- Enter your garden area in square feet and run a soil test to obtain your current soil pH and organic matter percentage.
- Enter your current pH and target pH — most vegetables prefer 6.0–7.0; blueberries prefer 4.5–5.5.
- Select your soil type (sandy, loam, or clay) since clay soils require more amendment material to shift pH.
- Review Lime Needed (lbs) to raise pH or Sulfur Needed (lbs) to lower pH, and apply the recommended amount evenly.
- Use the Compost Needed (cu ft) and Fertilizer (10-10-10) outputs to improve organic matter and baseline fertility.
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