Reviving Thinning Bahia Grass in Florida: Soil Testing and Nutrient Management

Reviving Thinning Bahia Grass in Florida: Soil Testing and Nutrient Management

Southeast Florida (zip 34984), Bahia grass thinning, weeds taking over. You cannot fix this without a soil test.

Why Bahia Is Special

• Loves acidic soil: pH 5.0–6.0 (like blueberries).
• Hypersensitive to iron deficiency—common in sandy, high-pH Florida soils.
• Deep roots (8–10 ft) = incredible drought tolerance.

The Problem

Florida soils are often calcareous (alkaline, pH >7). If your pH is high, Bahia starves—especially for iron. No fertilizer overrides wrong pH.

Action Plan

1. Soil test via UF/IFAS: soilslab.ifas.ufl.edu or SS312.
2. Request pH, P, K, Ca, Mg, Fe.
3. If pH >6.5: Apply elemental sulfur to lower it.
4. If iron low: Foliar iron chelate + soil sulfur.
5. Mow high (3–4 in) to shade weeds and reduce stress.

Local Help

St. Lucie County Master Gardeners: stlucie.ifas.ufl.edu. They have a great “Green Thumb” radio script on soil basics.

Bahia is a champion grass—if the soil lets it be. Test. Adjust. Watch it recover.