Maintaining a healthy St. Augustine lawn requires effective fungus treatment and weed control tailored to this popular grass type. Below is a summary table of carefully selected products designed to keep your St. Augustine grass lush, weed-free, and protected from fungal diseases.
| Product Name | Brand | Key Features |
|---|---|---|
| Southern Ag 006130 Atrazine St. Augustine Weed Killer 32oz Specialty Herbicide | Southern Ag | Controls weeds in St. Augustine grass effectively, treats up to 3,720 sq ft |
| LESCO 50 lb. St. Augustine Grass Weed and Feed with Penoxsulam | LESCO | Fertilizer and weed control with slow-release feeding for up to 8 weeks, covers 13,000 sq ft |
| Organic Fungicide Liquid Concentrate for Indoor and Outdoor Plants | ARBER | Certified organic fungicide targeting lawn fungus and powdery mildew, promotes soil health |
| Fertilome (13915) St. Augustine Weed & Feed 15-0-4 | ferti-lome | Pre-emergent and post-emergent herbicide with nutrient mix for St. Augustine and Centipede grasses |
| Sunniland Weed & Feed 20-0-6 Lawn Fertilizer for St. Augustine | Generic | Easy to use granules for weed control and fertilization, suitable for all St. Augustine grasses |
Southern Ag Atrazine St. Augustine Weed Killer
The Southern Ag 006130 Atrazine Specialty Herbicide is formulated specifically for controlling weeds in St. Augustine and Centipede grasses. One quart treats up to 3,720 square feet effectively. It works by targeting common invasive weeds without damaging the thick St. Augustine turf. This product is a precise herbicide option for weed control when fungus treatment is combined with maintenance. By selectively eliminating unwanted plants, it helps grass maintain a healthy, dominant presence in your lawn.
LESCO St. Augustine Grass Weed and Feed Fertilizer
This LESCO 50 lb. Weed and Feed is a professional-grade fertilizer combined with weed control specifically for St. Augustine grass. It treats up to 13,000 sq ft and includes 17-0-17 nutrients balanced for healthy turf growth. The slow-release nitrogen supports feeding for up to 8 weeks, while the included penoxsulam ingredient controls a broad spectrum of grassy and broadleaf weeds. Application is recommended on wet turf followed by a drying period to activate the weed treatment fully.
Organic Fungicide Liquid Concentrate for Lawn Fungus
The ARBER Organic Fungicide is an excellent natural option for protecting St. Augustine grass from fungal diseases like powdery mildew, root rot, and rust. As a certified organic product, it improves soil health while strengthening plant vitality. It works well for both indoor and outdoor plants, including lawns, delivering long-lasting protection and reducing fungal infection risk without harsh chemicals. This is an ideal choice for organic gardeners focused on sustainable lawn care.
Fertilome St. Augustine Weed & Feed Fertilizer Mix
Fertilome (13915) Weed & Feed is a combination of pre-emergent and post-emergent herbicide along with a 15-0-4 fertilizer blend suitable for St. Augustine and other Southern lawn grasses. It effectively combats weeds while nourishing turf. This product is safe for common St. Augustine varieties but should never be applied to Bermuda or Northern grass types. Its dual action helps prevent weed seeds from germinating and controls existing weeds, supporting stronger, healthier grass.
Sunniland Weed & Feed Lawn Fertilizer for St. Augustine
The Sunniland Weed & Feed 20-0-6 fertilizer is designed with easy-to-spread granules that handle well during application. It’s recommended for two applications annually—in spring and fall—to effectively manage weed outbreaks and provide essential nutrients. Suitable for any type of St. Augustine grass, the product supports longevity and vigor while controlling unwanted weeds throughout the growing season.
Buying Guide for Fungus Treatment and Weed Control on St. Augustine Grass
Choosing the right fungus treatment and weed control product involves several considerations to protect and nurture your St. Augustine grass effectively.
Targeted Weed Control
Look for herbicides formulated specifically for St. Augustine grass to prevent damage. Chemicals like atrazine and penoxsulam are effective against common weeds without harming the turf. Verify whether the product controls both broadleaf and grassy weeds for comprehensive protection.
Fungus Treatment Options
Proper fungal control requires addressing diseases like powdery mildew, rust, and leaf spot. Organic fungicides provide safe, natural alternatives promoting soil and plant health. Chemical fungicides may be needed for severe infections but choose those safe for your grass type.
Nutrient Balance and Slow Release
A healthy lawn resists fungus and weeds better. Fertilizers with balanced nutrients, particularly nitrogen, phosphorus, and potassium, boost growth. Slow-release formulations feed turf gradually, reducing the risk of nutrient burn and promoting sustained health.
Application Timing and Coverage
Apply weed and feed products when the grass is wet and temperatures are moderate for optimal absorption and efficacy. Coverage area is critical; choose a product that matches your lawn size to avoid over- or under-application.
Environmental and Safety Considerations
Consider organic products if environmental impact and safety around children and pets are priorities. Always follow label instructions for dosage and precautions to minimize risks and maximize results.
Combination vs. Separate Treatments
Some products combine fertilizer, weed control, and fungicide, simplifying lawn care. Others may require separate applications for best effect. Evaluate your lawn’s specific needs and product formulation before selecting a treatment regimen.