Florida · Soil test

Florida soil-test fertilizer recommendations

Zone Forge reads your Florida soil test in Florida's own calibrated language — the critical levels and rate logic come straight from UF/IFAS — Standardized Fertilization Recommendations for Agronomic Crops, not a national average.

See Florida recommendations → Florida lime guide

Critical soil-test levels

  • P: critical 25 ppm (Mehlich-3 acid-mineral)
  • K: critical 35 ppm (Mehlich-3 acid-mineral)
  • Mg: critical 20 ppm (Mehlich-3 acid-mineral)

Per UF/IFAS — Standardized Fertilization Recommendations for Agronomic Crops — below the critical level, a yield response to the added nutrient is expected.

Published source: UF/IFAS — Standardized Fertilization Recommendations for Agronomic Crops

Frequently asked

What soil-test method does Florida use?

UF/IFAS — Standardized Fertilization Recommendations for Agronomic Crops. Zone Forge cites the publication on every recommendation.

Is the Florida soil-test calculator free?

Yes — the Florida soil-test recommendation calculator is free and needs no signup. Enter your lab values for source-cited P, K and lime guidance.

Zone Forge reads every Florida soil test in its own state's language, then builds source-cited fertilizer and lime recommendations and full variable-rate prescriptions. See the science →