Finding the right weed and feed product for St. Augustine grass can protect your lawn while suppressing common invaders like dandelions, dollarweed, and crabgrass. This guide highlights five effective options, with practical notes on coverage, formulation, and application timing to help American homeowners maintain a healthy, dense St. Augustine lawn all season long.
Summary of Selected Products
| Product | Brand | Size / Coverage | Key Benefit |
|---|---|---|---|
| Sunniland St. Augustine Weed & Feed | Generic | 5,000 sq ft | Easy to spread granules; spring and fall applications; compatible with most St. Augustine grass types |
| BioAdvanced 3-in-1 Weed and Feed (10 lb) | BioAdvanced | 10 lb | 6 months weed prevention; targets broadleaf and grassy weeds; formulated for Southern lawns including Floratam |
| Southern Ag 32 oz Atrazine (St. Augustine Weed Killer) | Southern Ag | 32 oz | Direct weed control for St. Augustine and Centipede grasses; treats large areas |
| GreenView Fairway Formula (18 lb) | Greenview | 5,000 sq ft | Three-in-one: prevent crabgrass, kill weeds, and feed lawn; up to 4 months crabgrass block |
| The Andersons Premium Weed and Feed (18 lb) | The Andersons | 5,000 sq ft | Fast green up with quick- and slow-release nitrogen; controls dandelions and many broadleaf weeds |
Sunniland St. Augustine Weed & Feed Lawn Fertilizer
The Sunniland formulation is designed for practical home use on St. Augustine lawns, offering easy-to-spread granules that support weed suppression while feeding the turf. With two seasonal applications, typically in spring and fall, this product is suitable for a broad range of St. Augustine varieties. It provides a straightforward approach for homeowners seeking visible improvement without complex preparation. Application timing aligns with peak weed activity, making it a solid entry point for weed control in warm-season grasses commonly found in the American South and Southeast.
Key points: simple distribution, compatible with most St. Augustine types, and a dual-season plan that fits standard lawn care routines. Always follow the package directions for application rates to minimize risk to surrounding plants and turf health.
BioAdvanced 3-in-1 Weed and Feed for Southern Lawns (10 lb)
This BioAdvanced product is formulated for Southern lawns, including St. Augustinegrass and Floratam variants. It acts as both a weed killer and a fertilizer, offering up to six months of weed prevention. This makes it suitable for homeowners seeking long-lasting weed suppression while maintaining lawn health. The formulation targets broadleaf and grassy weeds such as crabgrass, dandelion, and clover, contributing to a healthier, more uniform turf appearance over time. Always apply according to label directions to maximize coverage and minimize risks.
Southern Ag Atrazine for St. Augustine Weed Control
Southern Ag Atrazine is a targeted weed killer option for St. Augustine grass, designed to treat 3,720 square feet per quart. It is formulated to control common weeds that invade warm-season lawns, including those that affect St. Augustine varieties. While focusing on weed control, this product can be used in combination with proper fertilization programs. Homeowners should follow safety guidelines and application rates precisely to protect the turf and avoid unintended effects on nearby plants or wildlife.
LESC O 50 lb St. Augustine Weed and Feed
LESCO’s professional-grade formulation is designed for St. Augustine turf, with a 50-pound bag intended for large areas (approximately 13,000 square feet). The product features slow-release nitrogen and a sulfur-coated urea blend to extend feeding. It’s suitable for Floratam varieties and other St. Augustine grasses, often used when turf is wet and allowed to dry before continuing with regular mowing. This option is well-suited for homeowners managing sizable lawns or landscaping projects with a need for longer-term feeding and weed control.
GreenView Fairway Formula Spring Fertilizer Weed and Feed
GreenView’s Fairway Formula provides a three-in-one solution: it prevents crabgrass, kills a broad range of weeds, and feeds the lawn. Coverage roughly extends to 5,000 square feet per bag, and it blocks crabgrass for up to four months. The formulation targets major broadleaf and grassy weeds, including dandelion, clover, and crabgrass seedlings, making it a versatile choice for homeowners seeking an all-in-one treatment during the peak weed period in spring and early summer.
The Andersons Premium Weed and Feed (18 lb)
The Andersons Premium Weed and Feed blends both quick- and slow-release nitrogen to provide a fast green-up along with extended feeding. It controls existing dandelions and more than 250 broadleaf weeds, delivering ongoing turf nourishment for St. Augustine grass. This product is designed for homeowners who want a balanced approach: immediate greening while sustaining health over several weeks, reducing the need for frequent reapplication when used as directed in a suitable climate and soil.
Buying Guide: Key Purchase Considerations
- Grass compatibility: Confirm the product specifically supports St. Augustine varieties (including Floratam) to ensure effectiveness and avoid damage.
- Weed targets: Identify the dominant weeds in your lawn (dandelion, dollarweed, crabgrass, clover, etc.) and choose a formula with proven efficacy against those species.
- Feeding plan: Decide between quick-green up formulations and slow-release options. A mix of immediate greening and longer-term feeding often yields the best results for warm-season lawns.
- Coverage and bag size: Larger lawns may benefit from higher coverage per bag, while smaller yards can use lighter formulations. Verify the square footage recommended on the bag.
- Application timing: Spring and fall are common windows for St. Augustine weed control; follow local climate patterns and product labels for timing and weather considerations.
- Safety and setup: Check spreader compatibility (granular vs. liquid), protect desirable ornamentals, and use protective gear as recommended by the label when applying.
- Environmental impact: Consider products with slow-release nitrogen to minimize leaching and runoff, supporting sustainable lawn care practices.
- Re-entry interval and restrictions: Be aware of any restrictions on watering, mowing, or re-entering treated areas after application.
- Cost and availability: Compare unit prices and bulk options if you have a large area, ensuring the chosen product provides value for your lawn program.
- Long-term lawn health: A weed-and-feed plan should be part of an integrated lawn care schedule that includes proper mowing height, irrigation, and occasional soil amendments for optimal St. Augustine growth.
Note: This article presents a range of products for weed control and lawn feeding on St. Augustine grasses. Always follow the manufacturer’s instructions for application rates, safety, and local regulations to maintain a healthy lawn.