St Augustine grass requires targeted care to prevent or control common fungal diseases while maintaining a lush, green lawn. The following picks emphasize products that either deliver fungicidal action or bolster turf health to resist disease. This guide compares options, features, and practical use for American lawns seeking reliable disease defense for Saint Augustine grasses.
| Product | Brand | Type | Size | Amazon Link (for reference) |
|---|---|---|---|---|
| Scotts Turf Builder Healthy Plus Lawn Food (2-in-1) | Scotts | Fungicide + Fertilizer | 4,000 sq ft | View |
| Scotts Turf Builder Healthy Plus Lawn Food (8,000 sq ft) | Scotts | Fungicide + Fertilizer | 8,000 sq ft | View |
| Sunniland St.Augustine Weed & Feed | Generic | Weed & Feed (contains fungicidal components) | 5000 sq ft | View |
| Southern Ag Atrazine St. Augustine Grass Weed Killer | Southern Ag | Weed Killer | 1 Gallon | View |
| TPS Plant Foods Complete Plant Food (St. Augustine) | TPS NUTRIENTS | Liquid Fertilizer | 32 oz | View |
For best results, consider how these products fit your lawn’s needs: disease pressure, soil conditions, sun exposure, and whether you want a combined fertilizer-and-fungicide solution or a dedicated weed-control option alongside aeration and proper mowing practices. The sections below detail five relevant products with practical application notes.
Scotts Turf Builder Healthy Plus Lawn Food
- Contains broad-spectrum fungicide and essential lawn nutrients
- Helps prevent common diseases while supporting healthy growth
- Suitable for St. Augustine and other warm-season grasses
Scotts Turf Builder Healthy Plus Lawn Food (4,000 sq ft)
- 2-in-1 formula combines disease protection with feeding
- Designed for warm-season grasses including St. Augustine
- Balanced nutrients support resilience during heat and stress
Sunniland St.Augustine Weed & Feed
- Easy-to-spread granules for convenient application
- Two applications in spring and fall align with growth cycles
- Compatible with all St. Augustine varieties
Southern Ag Atrazine St. Augustine Grass Weed Killer
- Kills many broadleaf weeds and suppresses crabgrass
- Effective for St. Augustine and centipede grasses
- Acts as a weed-control foundation to protect turf health
TPS Plant Foods Complete Plant Food for Saint Augustine Grass
- Liquid fertilizer tailored for Saint Augustine turf
- Supports healthy growth with balanced nutrition
- Helps maintain vibrant green color and robust root systems
Buying Guide: Key Purchase Considerations
- Germicidal action vs. growth support: Decide between combined fungicide-plus-fertilizer products or separate weed-control and fertilizer options based on disease pressure and nutrient needs.
- Grass compatibility: Most products target warm-season grasses; confirm suitability for Saint Augustine varieties like Palmetto, Raleigh, or Floratam in your region.
- Application timing: Apply fungicides and weed killers during favorable conditions, often before peak disease periods or before weed germination. Follow label directions for timing and dosage.
- Surface area and coverage: Choose product sizes that align with your lawn’s square footage to avoid excess or missed spots. Two-in-one products can simplify scheduling.
- Safety and environment: Use protective gear as indicated and store products away from children and pets. Consider environmental impact and runoff considerations near waterways.
- Soil health and irrigation: Fungicides may be more effective when soil moisture is appropriate. Watering schedules should complement treatment recommendations.
- Resistance management: Rotate between product classes to minimize resistance development in pathogens and weeds.
- Integrated lawn care: Combine chemical controls with mowing, aeration, and proper fertilization to sustain turf health and disease resistance.
These options present a balanced view of fungicidal and fungicide-adjacent products for St Augustine lawns. When selecting, prioritize localized disease pressures, lawn size, and compatibility with Saint Augustine varieties to optimize results without compromising lawn health.