Florida St. Augustine Organic Weed Control: Soil Test First

St. Augustine overrun with crabgrass, carpetgrass, broadleaf weeds. Organic solution starts with one non-negotiable: Soil test.

Why Soil Test?

Weeds indicate unhealthy turf. Healthy St. Augustine forms dense mat that physically excludes weeds. Your soil likely has: pH imbalance, nutrient deficiencies, compaction, low organic matter. Test reveals exact prescription.

Get Tested

Provide zip code for UF/IFAS Extension soil testing lab location/fees. Perfect timing: fall testing guides winter/spring amendments.

Cultural Weed Suppression

• Mowing: How often? Height? (St. Augustine: 3.5-4")
• Fertilizer history: Synthetic? Organic? When?
• Traffic: Kids, pets, equipment?
• Watering: Schedule, depth, frequency?

Organic Weed Management

• Hand-pull large weeds (moist soil = easy roots)
• Corn gluten meal: pre-emergent for crabgrass (apply at forsythia bloom)
• Overseed thin areas — but St. Augustine rarely seeded (sod/plugs)
• Compost topdressing builds density

Answer the cultural questions above + zip code = specific organic plan. St. Augustine wants to be weed-free—give it the soil to do so.