Healthy St. Augustine lawns resist disease and stay greener with proper care. While there isn’t a universal antifungal pill for every lawn, selecting products that improve turf vigor, control common weeds, and manage nutrients can reduce fungal pressure and keep your lawn resilient. This guide highlights five products that align with best practices for St. Augustine grass maintenance and disease prevention. Use as part of a holistic lawn plan that includes proper watering, mowing, and weed management.
| Product | Brand | What It Does |
|---|---|---|
| Southern Ag Atrazine St. Augustine Weed Killer | Southern Ag | Controls broadleaf and grassy weeds; suppression of crabgrass |
| LESCO 50 lb. St. Augustine Grass Weed and Feed | LESCO | Fertilizer plus weed control; tailored for St. Augustine |
| Sunniland St.Augustine Weed & Feed Lawn Fertilizer | Generic | Granulated weed & feed for St. Augustine lawns; spring/fall use |
| TPS Plant Foods Complete Plant Food (Liquid) | TPS NUTRIENTS | Liquid growth boost; even coverage; root strengthening |
| Floratam St. Augustine Grass Plugs | Circle C Farms | Active planting material; supports thick turf edges and recovery |
Southern Ag Atrazine St. Augustine Weed Killer
This atrazine-based product is designed for St. Augustine and centipede lawns, offering broad weed control with additional crabgrass suppression. Atrazine acts systemically on certain weed species, helping reduce competition that can stress grass and invite fungal pathogens. When applying, follow label directions for timing and rate to avoid stress during hot or drought conditions. Surfactants included or used separately can improve coverage, ensuring more uniform treatment across the turf. Regular use as part of an integrated weed-management plan supports healthier, more resilient lawns.
LESCO 50 lb. St. Augustine Grass Weed and Feed
Lesco’s St. Augustine weed and feed product combines essential nutrients with selective weed control. The blend is designed to feed the turf while targeting common weeds that compete for water and nutrients. Healthy, vigorously growing grass is better equipped to fend off fungal diseases. For best results, apply when the lawn is damp and follow with a light watering to help the product reach the root zone. This approach supports dense turf that reduces disease-friendly moisture pockets and weed competition.
Sunniland St.Augustine Weed & Feed
Sunniland’s weed and feed combines weed suppression with fertilizer tailored for St. Augustine varieties. Its granulated format makes it straightforward to apply in spring and fall windows, helping to maintain a robust lawn that resists disease pressures. Regular, measured applications can reduce weed competition that often harbors fungal spores or creates uneven moisture distribution. For best outcomes, water after application and monitor soil moisture to avoid prolonged leaf wetness that can encourage mold growth.
TPS Plant Foods Complete Plant Food (Liquid) 32 oz
TPS Plant Foods Liquid Complete Plant Food is designed to deliver a balanced nutrient package for thick, vibrant St. Augustine lawns. The liquid format supports uniform coverage, promoting stronger root systems and leaf tissue. Stronger turf grows more resilient against stressors, including fungal pathogens, by maintaining consistent nutrient availability. Application timing should align with seasonal growth spurts, with steady intervals to avoid nutrient flush that can encourage weed growth and disease risk.
TPS Plant Foods Complete Plant Food (Liquid) 8 oz
The smaller 8 oz bottle offers a convenient option for spot treatments or smaller lawns where liquid feeding is preferred. As with the larger bottle, the product supports lush green growth and root strength. For disease management, apply during periods of active growth and avoid letting soil stay waterlogged after application, which can invite fungal issues. Use as part of a broader schedule that includes mowing height regulation and proper irrigation practices.
Floratam St. Augustine Grass Plugs
Floratam plugs are a practical way to thicken thin spots and establish a robust turf base. Dense turf improves airflow and reduces the lingering moisture that can promote fungal growth. Note the shipping restrictions noted on the listing for certain states. When integrating plugs into an existing lawn, space them to promote rapid canopy development while ensuring adequate water and nutrient supply. This strategy can help create a more uniform stand less vulnerable to disease pressure.
Buying Guide: Key Purchase Considerations
- Grass variety compatibility: Confirm the product is suitable for St. Augustine cultivars such as Floratam to ensure the label recommendations align with your lawn.
- Weed versus disease focus: Choose products that address weed control and overall lawn vigor, which indirectly reduce fungal susceptibility by minimizing stress and crowding.
- Nutrient balance: Opt for fertilizers with balanced N-P-K values tailored to St. Augustine growth cycles. Avoid excessive nitrogen during heat stress periods to prevent lush, vulnerable growth.
- Application timing: Align treatments with seasonal growth patterns and irrigation schedules. Water after chemical or fertilizer applications as directed to maximize uptake while preventing leaf wetness that fosters fungal growth.
- Soil and moisture management: Regular soil testing helps tailor nutrient inputs. Proper irrigation—deep, infrequent watering—encourages deep roots and reduces disease-friendly moisture pockets near the soil surface.
- Environmental considerations: Some products have state-specific shipping restrictions or usage caveats. Plan purchases accordingly and follow label instructions precisely to protect turf and surrounding ecosystems.
- Integrated approach: Combine weed control, targeted fertilization, and overseeding strategies (like plugs) to promote dense, resilient turf capable of withstanding fungal challenges.