When dollar weeds invade a St. Augustine lawn, the goal is clear: control the weed without stressing the turf. This guide highlights options that work best for St. Augustine grass, including selective herbicides and compatible lawn care products. Each product is matched to a common lawn scenario so you can pick the right fit for your yard. The top picks below are best for homeowners seeking straightforward, effective weed management and healthy turf growth.
Summary table of selected products
| Product | Best For | Key Benefit |
|---|---|---|
| Sunniland St.Augustine Weed & Feed Lawn Fertilizer for St. Augustine Grass 5000 sq ft | Active lawns needing weed control and fertilization | Easy to spread; two applications per year; suitable for all St. Augustine types |
| Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon | Broadleaf weed suppression and crabgrass control | Versatile use in St. Augustine and centipede areas; strong weed suppression |
| LESCO 50 lb. St. Augustine Grass Weed and Feed with Penoxsulam | Season-long feeding with weed control | Slow-release, long-lasting feeding; Floratam-safe; large-surface coverage |
| Spectracide Weed And Grass Killer 1.33 Gallon, AccuShot Sprayer Refill | Spot treatment on driveways, walkways, and edging around turf | Fast-acting formula; supports rapid weed and grass elimination in targeted areas |
| St. Augustine Palmetto Grass Plugs (Florida Foliage) | Lawn establishment and density for shaded or tough sites | Shade, drought, and salt tolerance; helps create a robust lawn foundation |
Sunniland St.Augustine Weed & Feed Lawn Fertilizer for St. Augustine Grass 5000 sq ft
This product combines weed control with feeding for St. Augustine lawns. Best for homeowners who want a straightforward, two-application approach in spring and fall. It is suitable for all St. Augustine varieties, offering broad compatibility with common lawn types in the Southeastern region.
Who it’s best for: homeowners seeking a convenient, mixed-care product that targets dollar weeds while nourishing the turf. Why selected: it provides two yearly treatments and supports overall lawn health. Caution: verify compatibility with your specific St. Augustine cultivar before application.
Southern Ag Atrazine St. Augustine Grass Weed Killer, 1 Gallon
Attributed as a broadleaf and grassy weed suppressant, this atrazine-based product is a common choice for St. Augustine lawns dealing with dollar weeds and crabgrass. Best for established lawns needing effective suppression across multiple weed types while maintaining turf integrity.
Who it’s best for: gardeners needing robust weed suppression with a versatile use profile. Why selected: it targets a wide spectrum of weeds beyond dollar weeds. Caution: atrazine products can interact with certain soil conditions and should be used as directed to avoid turf stress.
LESCO 50 lb. St. Augustine Grass Weed and Feed with Penoxsulam
Lesco’s formulation combines weed control with slow-release nutrients designed for St. Augustine turf. Best for larger areas needing combined weed suppression and sustained feeding, with suitability for Floratam varieties. Choosing this option supports extended turf care with fewer applications.
Who it’s best for: commercial or residential lawns requiring robust, long-lasting feeding alongside weed control. Why selected: slow release extends feeding up to eight weeks. Caution: apply only when turf is wet as directed to avoid inefficient uptake.
St. Augustine Palmetto | 9 Live Extra Large Grass Plugs
Palmetto is a native St. Augustine cultivar known for deeper color and finer texture, with enhanced shade and drought tolerance. Best for sites needing reliable establishment and density, especially in partially shaded or challenging climates.
Who it’s best for: homeowners starting new lawns or restoring thin areas needing resilient, shade-tolerant grass. Why selected: Palmetto’s tolerance traits can improve overall lawn performance in mixed sun conditions. Caution: as with all plugs, planting density and maintenance influence establishment speed.
St. Augustine Palmetto | 18 Live Extra Large Grass Plugs
This larger-plug option supports faster lawn establishment in areas with shade, salt exposure, or drought risk. Best for larger restoration projects or thicker turf areas where quicker cover is desired.
Who it’s best for: landscape projects needing quicker density gains. Why selected: Palmetto density and tolerance traits help achieve a more uniform lawn. Caution: success depends on proper planting spacing and aftercare for root establishment.
Spectracide Weed And Grass Killer 1.33 Gallon, AccuShot Sprayer Refill
Designed for spot treatment around hardscape and edging, this AccuShot refill makes it easy to target dollar weeds without broad lawn impact. Best for controlling localized weed pockets while preserving turf health.
Who it’s best for: homeowners who want precise weed spot control. Why selected: fast-acting results enable quick lawn improvements. Caution: direct application to desirable grass around treated areas may require careful spraying to avoid unintended turf damage.
Buying Guide: Key Considerations For Dollar-Weed Control In St. Augustine Lawns
- Weed spectrum: Identify whether dollar weeds are the primary issue or if other weeds like crabgrass are also present. Choose products that address the specific weed profile of your lawn.
- Turf compatibility: Confirm that the product is labeled for St. Augustine grass and the cultivar you have (such as Floratam or Palmetto). Some formulations are more suitable for certain varieties.
- Ground conditions: Soil moisture and turf wetness affect application results. Apply slow-release blends when the turf has adequate moisture but avoid stressing turf during heat spikes.
- Application timing: Spring and fall are common windows for weed-control programs in warmer climates. Plan two applications in moderate weather to maximize effectiveness.
- Safety and site considerations: For products like Atrazine or broad-spectrum sprays, follow label directions to protect nearby trees, shrubs, and water sources. Use spot treatments where possible to minimize runoff.
- Maintenance balance: Combine weed control with a feeding plan. Healthy, dense turf resists weed establishment better than sparse lawns, so consider products that offer both nutrition and weed control when appropriate.
FAQ
- What is the best approach to kill dollar weeds in St. Augustine grass?
– Use a selective herbicide labeled for St. Augustine grasses and targeted to dollar weeds, paired with appropriate lawn fertilization to promote healthy turf growth. - Can I use Atrazine on St. Augustine lawns?
– Atrazine-based products are used on many St. Augustine lawns but must be applied according to label instructions and local regulations to protect turf health and the environment. - Should I fertilize at the same time as weed treatment?
– Many weed-and-feed products combine fertilization with weed control. If using separate products, allow proper intervals to avoid nutrient burn and ensure effective weed control. - Is Palmetto a good choice for lawns with dollar weeds?
– Palmetto is a St. Augustine cultivar known for shade tolerance and dense growth, which can help reduce weed establishment when properly maintained. - How long does it take to see results after applying weed killers?
– Results vary by product but some formulations show visible effects within hours to days; follow label guidance for reapplication timing and turf recovery.