Finding an effective grub killer tailored for St. Augustine grass helps protect your lawn from grub damage while supporting healthy growth. This guide reviews five top options, highlighting how they work, coverage, and key considerations to help you choose the right product for your yard. Each item here is chosen for relevance to St. Augustine turf and pest prevention, with clear usage guidance andReferences to official product features.
| Product | Brand | Key Coverage | Notes |
|---|---|---|---|
| Scotts GrubEx1 Season Long Grub Killer | Scotts | Up to 4 months protection for lawns up to 4,000–5,000 sq ft | Kills grubs when young; also controls caterpillars and other listed pests; annual use helps with Japanese beetle management |
| Southern Ag Atrazine St. Augustine Weed Killer | Southern Ag | Weed control for St. Augustine and Centipede grasses | Herbicide, focuses on weed suppression rather than grub control; use as part of lawn care plan |
| Fertilome St. Augustine Weed & Feed 15-0-4 | ferti-lome | Weed control plus fertilizer for St. Augustine lawns | Pre-emergent and post-emergent weed control; not a grub killer but supports turf health |
| Spectracide Weed Stop For Lawns | Spectracide | Controls emerged and seed-weeds in St. Augustine and centipede lawns | Contains atrazine; targeted weed management for St. Augustine varieties |
| Sunniland Weed & Feed Lawn Fertilizer 20-0-6 | Generic | Fertilizer plus weed control for St. Augustine lawns | Easy to spread; two applications per year; supports overall lawn health |
Summary: The following selections provide focused grub prevention or lawn health support for St. Augustine turf. When choosing a product, consider grub pressure, turf health, and whether you want direct grub control or broader weed and nutrient management. Always follow label directions for application timing and compatibility with St. Augustine grass varieties.
Scotts GrubEx1 Season Long Grub Killer
Product Overview: Scotts GrubEx1 is designed to prevent turf damage by killing grubs when they are young. A single application can protect lawns for up to four months, aligning with typical grub activity windows. In addition to grubs, this product lists control for caterpillars (armyworms), chinchbugs, May/June beetles, and more as noted on the label, with ongoing annual use helping manage Japanese beetle populations. For St. Augustine lawns facing grub pressure, GrubEx1 offers a targeted, season-long approach to grub suppression, potentially reducing root feeding and subsequent turf stress.
Key Features: Season-long grub protection; broad-spectrum beetle larva control; compatible with annual application; supports long-term lawn health in St. Augustine varieties. Use as part of an integrated pest management plan, especially in areas with known grub activity. Consider soil type and watering requirements to maximize effectiveness per label guidance.
Considerations: This product is focused on grubs and certain beetles; it is not a general weed or fertilizer solution. For lawns with heavy weed issues or nutrient deficits, pairing GrubEx1 with appropriate herbicides or fertilizers may improve overall turf condition. Always observe the label’s application timing and coverage area to ensure optimal results.
Southern Ag Atrazine St. Augustine Weed Killer
Product Overview: This atrazine-based herbicide is formulated to control weeds in St. Augustine and Centipede grasses. A quart treats a substantial area (approximately 3,720 sq ft). It is designed for lawn weed management rather than grub control, making it a useful component when weeds compete with turf density. For St. Augustine lawns facing weed encroachment, Southern Ag Atrazine St. Augustine Weed Killer offers a practical option to restore turf uniformity while maintaining compatibility with grass type.
Key Features: Targeted weed control for St. Augustine; suitable for Centipede grasses; notable coverage in a standard quart bottle. As with all chemical herbicides, apply according to label directions and consider compatibility with neighboring plants and seasonal growth stages. Always observe safety guidelines and avoid application on stressed or dormant turf unless specified.
Considerations: Atrazine-containing products require careful handling and adherence to usage restrictions. They are not grub killers, but they address weed management, which can indirectly support the health and appearance of your St. Augustine lawn by reducing competition and improving nutrient uptake by the turf.
Fertilome St. Augustine Weed & Feed 15-0-4
Product Overview: Fertilome Weed & Feed blends pre-emergent and post-emergent weed control with a 15-0-4 fertilizer mix. It is designed for Centipede, Zoysia, and St. Augustine grasses, offering an integrated approach to weed suppression and turf nourishment. While not a dedicated grub killer, this product supports lawn vigor, which can help St. Augustine grasses resist stress from pests and weed competition.
Key Features: Combines weed control with a fertilizer blend; suitable for multiple warm-season grasses including St. Augustine; not suitable for Bermuda or some northern grasses. Benefits from proper timing with lawn growth cycles and irrigation practices for best results. Use as part of a broader lawn management plan that includes grub control if damage risk is high.
Considerations: Since this product does not directly target grubs, owners facing grub pressure should pair it with a dedicated grub control product. Review the label for any restrictions on tank-mixing and ensure compatibility with other lawn care products used in your routine.
Spectracide Weed Stop For Lawns
Product Overview: Spectracide Weed Stop is a ready-to-spray concentrate designed to kill weeds in St. Augustine and centipede lawns without harming the lawn when used as directed. It includes an atrazine component for broad weed control. This product provides a weed-focused solution to maintain turf health by reducing weed pressure, which can indirectly benefit St. Augustine grass quality and uniformity.
Key Features: Kills weeds while protecting lawn; practical for both emerged weeds and seeds; atrazine-based formulation suitable for St. Augustine varieties. Follow label directions to minimize risk to non-target plants and ensure compatibility with your existing lawn care program. This product is part of a broader weed management strategy rather than a grub-specific treatment.
Considerations: Use in accordance with local regulations and weather conditions to maximize effectiveness and minimize environmental impact. Pair with grub-targeted products if grub pressure is documented in your area.
Sunniland Weed & Feed 20-0-6
Product Overview: Sunniland Weed & Feed blends a 20-0-6 fertilizer with weed control, designed for St. Augustine lawns. The package emphasizes easy spreading and handling, with two applications recommended in spring and fall. This product supports turf growth while managing weeds, which can help reduce stress on St. Augustine grass and improve overall lawn appearance.
Key Features: Simple application with two seasonal treatments; compatible with St. Augustine grasses; focuses on weed suppression and nutrient provision. This option is valuable for homeowners seeking a straightforward lawn care routine that blends fertilization with weed control, complementing grub management strategies as needed.
Considerations: It is not a grub killer, so integrate it with an appropriate grub control product if grubs are present. Always confirm compatibility with your specific St. Augustine cultivar and irrigation practices to ensure optimal effectiveness.
Buying Guide: Grub and Lawn Health For St. Augustine Grass
When selecting a grub control or lawn health product for St. Augustine grass, consider the following:
- Grub Pressure and Lifecycle: Identify whether grubs are actively feeding in your region. Products like Scotts GrubEx1 Target grubs during their early life stage and offer season-long protection. In areas with consistent grub activity, plan applications accordingly and space applications per label directions.
- Targeted vs. Broad-Spectrum: For direct grub suppression, prioritize grub-focused products. If weeds are a major issue, choose herbicides like Spectracide or Atrazine-based solutions that fit your lawn type, ensuring no interference with grub control.
- Grass Compatibility: St. Augustine lawns have specific chemical tolerances. Avoid products not labeled for St. Augustine or those labeled for other warm-season grasses that may cause damage. Always verify label guidance for your turf variety.
- Soil and Irrigation: Some products require wetting the turf or avoiding watering immediately after application. The irrigation schedule can influence effectiveness, particularly for slow-release fertilizers and herbicides with residual activity.
- Integrated Approach: A healthy lawn often requires a combination of grub control, weed management, and fertility. Use GrubEx1 for grub prevention, while supplementing with weed control and appropriate fertilization to maintain turf vigor and resilience against pests.
- Environmental and Safety Considerations: Follow label instructions for safe handling, application rates, and any restrictions on proximity to water sources or gardens. Consider local regulations and best practices for chemical use in residential landscapes.
- Application Timing: Align treatments with the grass’s growth cycle and pest activity seasons. Spring and early summer are common windows for grub activity in many regions, while weed control products have specific seasonal recommendations for optimal efficacy.
By evaluating grub risk, turf health, and weed management needs, you can craft a balanced plan that maintains a lush, resilient St. Augustine lawn throughout the growing season.