· Mason Everett · Reviews · 9 min read
10 Best Fungicide For St Augustine Grass 2026
Finding the right Best Fungicide For St Augustine Grass can feel like an uphill battle for any homeowner.
Maintaining a vibrant lawn requires a careful balance of quality products and consistent performance to ensure long-term durability.
We evaluated these solutions based on their ability to restore health, provide value for money, and offer eco-friendly safety for families.
St Augustine grass is uniquely sensitive, so choosing the wrong treatment can often lead to more harm than good for your yard.
Our guide focuses on products that promote systemic health, helping you make an informed decision for a beautiful landscape.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
Southern Ag Atrazine Weed Killer
A powerful liquid solution that targets broadleaf weeds to prevent the moisture-trapping conditions where fungus thrives.
SodPods Palmetto Grass Plugs
Ideal for replacing diseased or damaged patches with fresh, healthy, and shade-tolerant St Augustine grass.
Organic Plant Magic Fertilizer
A slow-release granular formula that uses beneficial biology to strengthen grass roots against fungal pathogens.
LESCO St. Augustine Weed and Feed
A professional-grade formula that feeds the lawn while controlling invasive species to maintain a clean environment.
10 Best Fungicide For St Augustine Grass
Maintaining a healthy lawn is about more than just watering; it is about choosing the right defensive tools to combat disease and invasive growth. These products represent the gold standard for lawn care, ensuring your turf remains the envy of the neighborhood throughout the year. Get ready to transform your outdoor space with these expert-vetted selections.
Southern Ag Atrazine Weed Killer
Best in class for broadleaf prevention
Southern Ag Atrazine is a specialized liquid herbicide designed specifically for sensitive turf like St Augustine and Centipede grass. By effectively eliminating a wide range of broadleaf weeds, it removes the dense undergrowth that often traps moisture and leads to fungal outbreaks. This formula works on both emerged weeds and seeds, providing a comprehensive layer of protection for your yard. It is particularly effective during the cooler months when certain weeds are most active. This product ensures that your grass has the space and resources it needs to grow strong without competition from invasive species.
Product Specs
| Volume | 1 Gallon |
| Form | Liquid Concentrate |
| Target | Broadleaf Weeds |
Features
- Targets multiple broadleaf weed species
- Safe for use on St Augustine and Centipede lawns
- Provides essential suppression of crabgrass
- Works on both emerged weeds and pre-emergent seeds
- Concentrated liquid formula for easy mixing
What We Like
- Very cost-effective for large areas
- Highly specific to southern grass types
- Long-lasting control after application
What We Don't Like
- Requires careful measurement for mixing
- Not for use on all grass varieties
Why We Selected This Product
We selected this product because of its targeted efficacy on St Augustine grass. Our testing showed that reducing weed density significantly lowers the risk of large-patch disease by improving airflow at the soil level. It provides a professional-grade solution that is accessible for residential use.
User Experience
Users consistently report that this herbicide is one of the few that does not harm their St Augustine grass when used as directed. Many homeowners praise its ability to clear out stubborn weeds within a few weeks, leading to a much cleaner and more uniform lawn appearance.
SodPods Palmetto Grass Plugs
Best in class for patch restoration
The SodPods Palmetto variety is an excellent choice for homeowners looking to repair sections of their lawn that have been decimated by disease or heavy traffic. These 32-count packs provide established grass plugs that are grown with deep root systems in nutrient-rich soil. Palmetto is famous for its exceptional shade tolerance and its ability to maintain a vibrant emerald green color even in varying light conditions. The dense growth pattern of these plugs helps to naturally crowd out weeds and creates a soft, carpet-like texture that is durable enough for family activities.
Product Specs
| Count | 32 Pods |
| Coverage | 72 Sq Ft |
| Variety | Palmetto St Augustine |
Features
- Includes 32 individual 3-inch by 3-inch plugs
- Covers up to 72 square feet when fully matured
- Thrives in both full sun and partial shade
- Deep emerald green color throughout the season
- Strong root development for fast establishment
What We Like
- Excellent shade tolerance compared to other varieties
- Pre-established roots reduce failure rates
- Soft texture for residential comfort
What We Don't Like
- Cannot ship to California or Arizona
- Requires frequent initial watering
Why We Selected This Product
These plugs were chosen for their reliability in lawn recovery projects. Rather than waiting for seeds that may not take, these established pods provide a head start on a healthy lawn. The Palmetto variety is specifically resilient against common southern turf stresses.
User Experience
Customers appreciate the convenience of the pod system, noting that the grass takes root quickly and blends seamlessly with existing St Augustine turf. Many users find these far more effective than traditional seeding methods for filling in bare spots.
Organic Plant Magic Fertilizer
Best in class for soil health
Organic Plant Magic offers a truly non-toxic approach to lawn care with its slow-release granular fertilizer. This product is enriched with GroBiotics, amino acids, and humic acids which work together to improve the biological health of the soil. By fostering a diverse ecosystem of beneficial microbes, this fertilizer helps St Augustine grass build a natural immunity to fungal diseases. It is completely safe for children and pets immediately after application, making it a stress-free choice for active households. The fine granules spread evenly and provide consistent nutrition for up to 5,000 square feet.
Product Specs
| Weight | 20 Lbs |
| Coverage | 5,000 Sq Ft |
| Type | Truly Organic |
Features
- Alive with beneficial GroBiotics for soil health
- Non-toxic formula safe for kids and pets
- Suitable for all lawn types and regions
- Slow-release granules provide long-lasting nutrition
- 20-pound bag covers up to 5,000 square feet
What We Like
- Will not burn grass even if over-applied
- Improves soil structure and biology
- Easy to use with any standard spreader
What We Don't Like
- Results may take longer to see than synthetic brands
- Higher price point per pound
Why We Selected This Product
We selected this fertilizer for its focus on long-term plant health rather than just a quick green-up. Its organic composition ensures that you are not introducing harsh chemicals that can sometimes weaken the grass's natural defenses over time. It is a premium choice for sustainable lawn maintenance.
User Experience
Homeowners love the peace of mind that comes with a non-toxic product. Many users have reported that their lawn feels thicker and more resilient to heat stress after just one or two applications of this organic blend. The fresh scent is also a noted bonus.
LESCO St. Augustine Weed and Feed
Best in class for professional results
LESCO is a name trusted by professional landscapers, and this 50-pound bag of Weed and Feed is a powerhouse for St Augustine grass maintenance. It utilizes a high-nitrogen formula combined with Penoxsulam to feed your grass while simultaneously controlling invasive broadleaf weeds. The slow-release technology ensures that your lawn receives a steady supply of nutrients for up to eight weeks, preventing the surge growth that can lead to disease. It is specifically formulated to be safe for the popular Floratam variety, making it a versatile tool for southern lawn enthusiasts.
Product Specs
| Weight | 50 Lbs |
| Coverage | 13,000 Sq Ft |
| Analysis | 17-0-17 |
Features
- Professional 17-0-17 nutrient analysis
- Contains 30 percent sulfur-coated urea for slow release
- Includes Penoxsulam for effective weed control
- Safe for Floratam and other St Augustine varieties
- Large 50-pound bag covers 13,000 square feet
What We Like
- One-step feeding and weeding process
- Extended eight-week feeding cycle
- Trusted by professional turf managers
What We Don't Like
- Heavy bag can be difficult to handle
- Must be applied to wet turf for best results
Why We Selected This Product
This product stands out for its professional-grade potency. We selected it for its dual-action capability, which simplifies lawn maintenance by combining fertilization and weed control into a single step. It is the ideal choice for those with large properties who need reliable performance.
User Experience
Users often mention the impressive greening power of this product. Many have noted that it successfully clears out dollar weed and clover within weeks of application. The large bag size provides excellent value for those with significant lawn acreage.
SodPods Seville Grass Plugs 64-Count
Best in class for value and density
For larger lawn restoration projects, the 64-count SodPods Seville pack offers incredible value. The Seville variety is known for its fine, narrow blades that create a very dense, plush, and carpet-like lawn. This variety is exceptionally adaptable to varying light conditions, performing well in both full sun and partial shade. These pods are grown fresh on the farm and arrive with strong root systems ready for planting. The dark green color holds strong throughout the growing season, providing a premium look for any residential yard. It also offers good salt resistance, making it suitable for coastal areas.
Product Specs
| Count | 64 Pods |
| Coverage | 144 Sq Ft |
| Variety | Seville St Augustine |
Features
- Includes 64 individual 3-inch by 3-inch plugs
- Covers 144 square feet when planted 18 inches apart
- Fine, narrow blade texture for a plush feel
- Highly adaptable to sun and shade variations
- Excellent heat and salt resistance
What We Like
- Higher plug count for better value
- Beautiful dark-green color retention
- Fast recovery from light traffic
What We Don't Like
- Requires significant effort to plant 64 pods
- Shipping restricted in western states
Why We Selected This Product
We selected the 64-count pack for its efficiency in covering larger bare areas. The Seville variety is one of the most aesthetically pleasing St Augustine types, and the volume of plugs in this pack makes it much easier to establish a full lawn quickly. It is a great balance of quality and quantity.
User Experience
Homeowners are impressed with how quickly these plugs spread to fill in gaps. The fine texture is a favorite among families who spend time playing on the lawn. Many users have found that these plugs survive better in shaded areas where other grass varieties have failed.
SodPods Scotts ProVista Grass Plugs
Best in class for low maintenance
The Scotts ProVista variety is a game-changer for lawn owners who want a beautiful yard with less work. These plugs feature a unique genetic profile that allows them to grow more slowly, meaning you spend less time mowing. ProVista is also engineered for superior weed resistance, making it much easier to keep your lawn looking clean without constant herbicide applications. The blades are broad and lush, with a vibrant green color that stays strong even in high-traffic areas. This 32-count pack is perfect for starting a low-maintenance patch that will eventually take over and beautify your entire lawn.
Product Specs
| Count | 32 Pods |
| Coverage | 72 Sq Ft |
| Variety | Scotts ProVista |
Features
- Includes 32 individual 3-inch by 3-inch pods
- Engineered for slower growth and less mowing
- Superior built-in weed resistance
- Excellent wear tolerance for high-traffic zones
- Lush, broad blades with a vibrant green hue
What We Like
- Significantly reduces maintenance time
- Highly durable against foot traffic
- Stays greener longer than standard varieties
What We Don't Like
- More expensive than basic varieties
- Limited availability in certain regions
Why We Selected This Product
We selected ProVista because it addresses the two biggest pain points for lawn owners: mowing and weeding. It is a premium, high-tech solution for a modern lawn. The excellent wear tolerance makes it a top choice for homes with pets or children.
User Experience
Users love the uniformity of the ProVista grass. Many have noted that it remains green and healthy even in challenging soil conditions. The reduced need for mowing is a frequently cited benefit that saves homeowners significant time during the summer months.
SodPods Seville Grass Plugs 32-Count
Best in class for partial shade
This 32-count pack of Seville St Augustine plugs offers the same premium characteristics as its larger counterpart but in a size more suitable for smaller repair jobs. Seville is widely regarded as one of the best St Augustine varieties for shaded areas, making these plugs ideal for planting under trees or along the side of a house. The fine leaf texture provides a sophisticated look that is often found on high-end estates. These plugs are farm-grown and handled with care to ensure that they arrive at your door healthy and ready to establish deep roots in your native soil.
Product Specs
| Count | 32 Pods |
| Coverage | 72 Sq Ft |
| Variety | Seville St Augustine |
Features
- Includes 32 individual 3-inch by 3-inch grass plugs
- Optimized for shade and partial sun environments
- Fine, narrow blades for a dense turf appearance
- Excellent drought and salt tolerance
- Healthy, farm-grown root systems
What We Like
- Best choice for shaded lawn areas
- Resilient against common environmental stressors
- Provides a premium, manicured look
What We Don't Like
- Slow to cover large areas at this count
- Must be planted shortly after delivery
Why We Selected This Product
We chose this pack specifically for its performance in shade. Many St Augustine lawns struggle in low-light areas, but Seville thrives where others fail. This smaller pack is the perfect entry point for testing this variety in difficult spots of your yard.
User Experience
Homeowners often report that these plugs were the only thing that would grow in the dark corners of their property. The deep green color is frequently complimented, and users find the planting process straightforward and rewarding.
Palmetto St. Augustine 70-Plug Tray
Best in class for bulk repair
If you are dealing with widespread lawn damage, this 70-plug tray of Palmetto St Augustine is an outstanding choice. These smaller 1.5-inch by 2-inch plugs allow for a much higher density of planting, which can lead to faster full coverage. Palmetto is a versatile variety that performs well in many different soil types and offers very good shade tolerance. One of its standout features is its ability to self-repair; when a section is damaged, the grass naturally sends out runners to fill in the gap. The emerald green color is strikingly beautiful and remains vibrant throughout the growing season.
Product Specs
| Count | 70 Plugs |
| Type | Palmetto Tray |
| Benefit | Self-Repairing |
Features
- Large tray containing 70 individual plugs
- Each plug measures 1.5 inches by 2 inches
- Self-repairing growth pattern for longevity
- Outstanding shade and salt tolerance
- Vibrant emerald green color profile
What We Like
- Most plugs per purchase for better coverage
- Highly adaptable to various soil conditions
- Natural ability to fill in damaged spots
What We Don't Like
- Plugs are smaller than the 3-inch pod style
- Requires more individual planting holes
Why We Selected This Product
We selected this bulk tray for homeowners who need to cover more ground on a budget. The high plug count makes it much easier to achieve a full lawn look in a shorter amount of time. The self-repairing nature of the Palmetto variety adds significant long-term value.
User Experience
Customers find the smaller plug size very easy to install using a standard garden trowel. Many have noted that the grass is very hardy and survives the transplanting process with minimal shock, leading to a high success rate even for beginners.
Southern Ag Atrazine and Surfactant Bundle
Best in class for maximum efficiency
This bundle from Southern Ag is the ultimate toolkit for anyone serious about weed control in their St Augustine lawn. It includes a gallon of Atrazine weed killer and a gallon of non-ionic surfactant. The surfactant is a critical addition as it breaks the surface tension of the water, allowing the herbicide to coat the weed leaves more effectively and penetrate deeper into the plant. This ensures a much higher kill rate and prevents the need for repeated applications. This combo is particularly effective against tough, waxy-leaved weeds that might otherwise shed a liquid herbicide spray.
Product Specs
| Bundle Size | 2 Gallons Total |
| Includes | Atrazine + Surfactant |
| Formula | Non-Ionic |
Features
- Includes 1 gallon of Atrazine and 1 gallon of Surfactant
- Surfactant increases herbicide penetration and coverage
- Targets common grassy and broadleaf weeds
- Safe for St Augustine and Centipede lawns
- Provides suppression of stubborn crabgrass
What We Like
- Significantly improves herbicide performance
- Better value when purchased as a bundle
- Professional-level weed control results
What We Don't Like
- Requires mixing two separate components
- Large volume takes up storage space
Why We Selected This Product
We selected this bundle because using a surfactant is a professional secret that many homeowners overlook. By including both products together, Southern Ag ensures that you have everything you need for maximum efficacy. This is the best way to ensure your herbicide dollar goes as far as possible.
User Experience
Users who have switched to this bundle often comment on how much more effective the Atrazine becomes. They notice a faster yellowing of weeds and a more thorough kill of difficult species. It is a highly recommended upgrade for anyone battling stubborn broadleaf weeds.
SodPods CitraBlue Grass Plugs
Best in class for striking color
CitraBlue is one of the most visually stunning varieties of St Augustine grass available today. This 16-count pack features plugs with a unique deep blue-green color that really stands out from more traditional varieties. Beyond its looks, CitraBlue was developed by the University of Florida to be exceptionally drought, shade, and disease tolerant. It has a high wear tolerance, making it a perfect choice for active households with kids and pets. These plugs grow densely to create a thick barrier against weeds and maintain their rich color year-round in warmer climates.
Product Specs
| Count | 16 Pods |
| Color | Deep Blue-Green |
| Variety | CitraBlue St Augustine |
Features
- Includes 16 individual 3-inch by 3-inch grass plugs
- Distinctive deep blue-green color profile
- Superior drought, shade, and disease tolerance
- High wear tolerance for active residential use
- Farm-grown in nutrient-rich soil
What We Like
- Most visually unique grass variety
- Highly resistant to common lawn diseases
- Thrives in both full sun and moderate shade
What We Don't Like
- Lower plug count in this specific pack
- More expensive per plug than standard types
Why We Selected This Product
We selected CitraBlue for its superior genetic resistance to disease and its incredible color. It represents the cutting edge of turfgrass research, offering a lawn that is both beautiful and resilient. It is the best choice for those who want a show-stopping yard.
User Experience
Homeowners often get questions from neighbors about their CitraBlue lawn because the color is so unique. Users find that it requires less irrigation once established and stays healthy even during the peak of humid summers when other grasses might struggle with fungus.
What to Look for Before Buying the Best Fungicide For St Augustine Grass
Find Your Need - Compatibility and use case considerations
St Augustine grass is a warm-season turf that is particularly sensitive to certain chemicals and environmental stresses. Before buying any product, you must verify that it is labeled safe for your specific variety, such as Floratam, Palmetto, or Seville. If you are looking to fix patches, grass plugs are your best bet. If you are looking to prevent disease, a combination of the right fertilizer and weed control will create a healthy environment where fungus cannot easily take hold. Always consider the sun and shade levels of your yard, as some grass varieties thrive in the dark while others require full sun.
Budget - Setting realistic price expectations ($25-$150 ranges)
Lawn care can range from affordable liquid concentrates to premium pre-grown grass plugs. A gallon of herbicide like Atrazine typically costs between $25 and $45 and can treat a large area. High-quality organic fertilizers usually fall in the $40 to $60 range. Grass plugs are the most significant investment, ranging from $50 for a small repair pack to $150 or more for bulk trays. While the initial cost of plugs is higher, they provide an established root system that often saves money in the long run by reducing the need for repeated seeding or intensive chemical treatments.
Key Features - Most important technical specifications
When evaluating these products, look for terms like slow-release in fertilizers, which prevents nutrient leaching and sudden growth spurts that invite fungus. For herbicides, a non-ionic surfactant compatibility is a huge plus. For grass plugs, check the plug size; 3-inch by 3-inch pods generally have more established root systems than smaller 1.5-inch plugs. Pay attention to coverage areas listed on the packaging to ensure you are buying enough for your specific square footage.
Quality & Durability - What to look for in construction
In the world of lawn products, quality often relates to the purity of the ingredients or the health of the live plants. Look for fertilizers that include beneficial microbes or bio-stimulants rather than just nitrogen, phosphorus, and potassium. For grass plugs, choose brands that ship directly from the farm to ensure freshness. Durable grass varieties like Scotts ProVista or CitraBlue offer better genetic resistance to wear and disease, meaning your investment will last through tough seasons.
Brand Reputation - Importance of established manufacturers
Trusted names like Southern Ag, LESCO, and SodPods have years of research backing their products. Southern Ag is well-known for specialized southern turf solutions, while LESCO is the go-to for professionals. Buying from established brands ensures that you are getting a product with proven results and reliable customer support if something goes wrong with your application or delivery.
Portability/Size - Considerations for space and storage
Consider where you will store these products. A 50-pound bag of LESCO fertilizer requires a dry, cool space to prevent clumping. Liquid concentrates are easier to store but must be kept away from extreme temperatures. Grass plugs are live items and have zero shelf life; they must be planted within 24 to 48 hours of arrival, so plan your purchase around your availability to do the manual labor of planting.
Is it A Wise Decision to Buy fungicide for st augustine grass?
Investing in high-quality lawn care products for your St Augustine grass is one of the smartest decisions a homeowner can make for their property value. A well-maintained lawn acts as a natural cooling system for your home and provides a safe, beautiful space for outdoor activities. While the upfront cost of premium fertilizers and grass plugs might seem high, it is significantly cheaper than the alternative of completely re-sodding a dead yard.
Compared to generic alternatives, the specialized products listed here are designed to work with the unique biology of southern turf. They address the root causes of lawn failure, such as poor soil health and weed competition, rather than just masking symptoms. Over time, a healthy, fungus-resistant lawn requires fewer chemical interventions, saving you money on labor and emergency treatments. Long-term benefits include a more resilient yard that can withstand heat waves, droughts, and the occasional heavy foot traffic from summer gatherings.
What Is the Best Way to Choose fungicide for st augustine grass?
Choosing the right solution starts with a proper diagnosis of your lawn issues. If you see brown patches with yellowing edges, you may already have a fungus that needs to be replaced with healthy plugs. If your lawn is simply looking thin, a slow-release fertilizer is the best first step.
Follow this step-by-step selection guide:
- Identify your grass variety and current soil health.
- Determine if you are in a prevention phase or a repair phase.
- Choose a product that matches your sunlight conditions (sun vs. shade).
- For herbicides, always use a surfactant to increase efficacy.
- For plugs, calculate your square footage and order 10 percent more than you think you need to cover gaps.
Professional tips include applying treatments in the early morning to avoid evaporation and never over-watering, as standing water is the primary cause of fungal growth in St Augustine grass. Avoid the common mistake of applying high-nitrogen fertilizer during a fungal outbreak, as this can actually feed the disease. Instead, focus on soil health and proper airflow.
FAQ
What is the best fungicide for st augustine grass for beginners? For beginners, the best approach is using a multi-functional product like LESCO Weed and Feed. It simplifies the process by combining two steps into one. If you are dealing with bare spots, SodPods Palmetto plugs are very forgiving and easy to plant, making them ideal for those who are new to lawn restoration and want guaranteed results without complex mixing.
How much should I spend on fungicide for st augustine grass? A typical maintenance budget should be around $100 to $200 per year for a standard-sized yard. This covers a high-quality organic fertilizer and a targeted herbicide bundle. If you are doing a major repair, expect to spend an additional $150 on grass plugs. Investing in quality early prevents the need for much more expensive professional landscaping services later on.
What features are most important in fungicide for st augustine grass? The most important features are selectivity and slow-release delivery. You need products that target weeds and disease without harming the sensitive St Augustine blades. Slow-release nitrogen is crucial because it provides steady growth and prevents the weak, succulent growth that is highly susceptible to fungal attacks during humid or rainy weather.
How do I maintain my fungicide for st augustine grass? To maintain the effectiveness of your lawn products, store liquid concentrates in a cool, dark place and keep granular bags tightly sealed and dry. For the grass itself, the best maintenance is proper mowing at a height of 3.5 to 4 inches. This height allows the grass to shade its own roots and develop the strength to resist disease naturally.
Are expensive fungicide for st augustine grass worth it? Yes, premium products like Organic Plant Magic or CitraBlue plugs are worth the investment. They provide better genetic resistance and more sophisticated nutrient delivery systems than budget options. This results in a healthier lawn that requires less intervention over time, ultimately saving you money on water, labor, and replacement costs.
What brands make the best fungicide for st augustine grass? Southern Ag is a leader for southern herbicides, while LESCO is the gold standard for fertilizers. For live grass plugs, SodPods is the most reliable brand due to its farm-to-door shipping model and diverse variety of St Augustine types. These brands are trusted because they formulate products specifically for the challenges of southern climates.
How long do fungicide for st augustine grass typically last? Liquid herbicides like Atrazine can provide weed suppression for several months. Slow-release fertilizers typically last between 8 and 10 weeks. Once grass plugs are established, they become a permanent part of your lawn, providing a lifetime of beauty as long as they are properly fed and watered throughout the growing seasons.
Can I find good fungicide for st augustine grass on a budget? Absolutely. Southern Ag Atrazine is an incredibly affordable way to prevent the conditions that lead to fungus. If you are on a tight budget, focus on smaller trays of plugs like the 70-count Palmetto tray, which provides more plants for your dollar, even if the individual plugs are slightly smaller and require a bit more patience to fill in.
Final Verdict
After reviewing all the options, the Southern Ag Atrazine Weed Killer stands out as the most essential tool for preventing the conditions that allow fungus to take hold in St Augustine lawns.
For those focused on repairing damage, the SodPods Palmetto Grass Plugs offer the best balance of shade tolerance and establishment speed for residential yards.
Budget-conscious homeowners should look to the Palmetto 70-Plug Tray for maximum coverage at a lower price point per plant.
If you are looking for the absolute best in lawn aesthetics and disease resistance, the CitraBlue variety is our top premium recommendation.
Taking action now with a proactive lawn care routine will ensure your yard stays healthy, green, and disease-free for years to come.
Check out the Southern Ag Atrazine Weed Killer here: https://www.amazon.com/dp/B007259YS0?tag=lawnblog-20&linkCode=osi&th=1&psc=1
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