St. Augustine grass combines beauty with unique weed-control needs. This guide highlights five liquid weed-and-feed products that are well-suited for St. Augustine lawns, helping manage common broadleaf weeds while providing essential nutrients. Each pick includes a concise look at how it works, coverage, and key features to help you decide which product fits your lawn care goals.
Summary Of Selected Products
| Product | Brand | Key Benefit | Approx. Coverage |
|---|---|---|---|
| Southern Ag Atrazine St. Augustine Weed Killer | Southern Ag | Targets weeds in St. Augustine and centipede grasses | 3,720 sq ft per quart |
| Hi-Yield Atrazine Weed Killer | VPG | Atrazine-based weed control for St. Augustine and centipede | Varies by area |
| Spectracide Weed & Feed 20-0-0 | Spectracide | Kills major broadleaf weeds and feeds lawn | 32 oz bottle |
| Bonide Liquid Weed & Feed 20-0-0 | Bonide | Kills a wide list of weeds; feeds as it sprays | 32 oz |
| Scotts Liquid Turf Builder With Plus 2 Weed Control | Scotts | Kills weeds and provides fertilizer and nitrogen boost | 32 oz |
Southern Ag Atrazine St. Augustine Weed Killer
The Southern Ag 006130 Atrazine St. Augustine Weed Killer is a quart-sized selective herbicide designed to control weeds specifically in St. Augustine and centipede grasses. It emphasizes weed suppression while allowing the lawn to continue growing. Coverage indicates that one quart treats roughly 3,720 square feet, making it a practical option for medium-to-large lawns. The formulation focuses on broadleaf and some grassy weed species commonly found in warm-season lawns, providing targeted control without excessive turf injury when used as directed.
Hi-Yield Atrazine Weed Killer
Hi-Yield Atrazine Weed Killer provides an atrazine-based option suitable for St. Augustine and centipede grasses. The product targets annual bluegrass and various common lawn weeds, helping to suppress weed emergence while supporting turf health. It is designed for outdoor use with clear guidance for application timing, focusing on actively growing weeds to maximize effectiveness. As with any herbicide, proper weather and water considerations are important to ensure optimal results and minimize turf stress.
Spectracide Weed & Feed 20-0-0
Spectracide Weed & Feed 20-0-0 offers a dual-action approach, combining weed control with lawn feeding. The product provides a 20 percent nitrogen formulation to nourish the lawn while addressing major broadleaf weeds such as dandelion, chickweed, knotweed, plantain, clover, mallow, and purslane. It is designed for ready-to-spray application and is suitable for St. Augustine and other warm-season grasses, helping to maintain green vigor while reducing weed pressure during the growing season.
Bonide Liquid Weed & Feed 20-0-0
Bonide Liquid Weed & Feed 20-0-0 provides a versatile option for outdoor lawns, including St. Augustinegrass. The product lists a wide range of common weeds it can kill, from clover and dandelion to knotweed and purslane, while delivering a 20-0-0 fertilizer to support lawn growth. It is designed for outdoor use across various turf types, emphasizing ease of application with a ready-to-spray format and compatibility with established lawn management practices.
Scotts Liquid Turf Builder With Plus 2 Weed Control
Scotts Liquid Turf Builder With Plus 2 Weed Control combines weed-killing action with a nitrogen-rich fertilizer to promote green growth. It targets a variety of broadleaf weeds and supplies nitrogen to actively growing grass, making it suitable for St. Augustine lawns experiencing weed pressure during the growing season. The product is designed for ready-to-spray application and offers a convenient option for homeowners seeking both weed control and turf nourishment in one step.
Buying Guide: Key Purchase Considerations For Liquid Weed & Feed On St Augustine Lawns
- Grass compatibility: Confirm the product explicitly supports St. Augustinegrass. Some formulas mention centipede and other warm-season grasses, but always verify lawn-type recommendations on the label.
- Weed target: Identify the main weeds in your lawn (dandelion, clover, bluegrass, etc.) and select a product with proven efficacy against those species.
- Nitrogen content and timing: Higher nitrogen helps immediate greening, but excessive feeding can stress heat-sensitive periods. Choose a formulation that aligns with your region’s growing season.
- Avoiding damage: Atrazine-based options can be effective but may have stricter usage guidelines. Read label directions for application rates, pre-emergent restrictions, and re-entry intervals.
- Application method: Look for ready-to-use spray formats for ease of use, especially if you prefer quicker, less-milo mixing steps.
- Coverage and dilution: Check the labeled coverage area per bottle to estimate how many applications your lawn will require and plan for even distribution.
- Safety and storage: Consider outdoor-use only formulations, and store away from children and pets as directed on the label.
- Environmental considerations: Choose products that minimize runoff risk, particularly in regions with heavy rainfall or near waterways.
- Maintenance integration: If you plan to fertilize separately, ensure your weed-control product complements your fertilization schedule without overloading the lawn.
These options provide a range of weed-control strategies and fertilization levels suitable for St. Augustine lawns. When selecting a product, balance weed control efficacy with lawn safety, application ease, and your local climate. Always follow label instructions for best results and adjust timing based on weed growth cycles and seasonal care needs.