Maintaining a lush, green St. Augustine grass lawn requires effective weed and feed products that not only fertilize but also control broadleaf and grassy weeds. In this guide, we present the best liquid weed and feed options specifically formulated for St. Augustine grass, tailored for American homeowners. Below is a summary table highlighting key products to help you choose the right solution for your lawn care needs.
| Product Name | Brand | Key Features |
|---|---|---|
| Scotts Liquid Turf Builder with Plus 2 Weed Control | Scotts | Kills broadleaf weeds, boosts nitrogen, ready-to-spray |
| Fertilome St. Augustine Weed & Feed 15-0-4 | ferti-lome | Pre- and post-emergent herbicide, fertilizer mix designed for St. Augustine |
| Sunniland Weed & Feed 20-0-6 Lawn Fertilizer | Generic | Easy-to-spread granules, works for all St. Augustine grasses |
| BioAdvanced 3-in-1 Weed and Feed for Southern Lawns | BioAdvanced | Kills weeds and fertilizes, 6-month weed prevention, southern lawns formula |
| LESCO 50 lb. St. Augustine Grass Weed and Feed | LESCO | Slow-release fertilizer, safe for Floratam variety, feeds up to 8 weeks |
Scotts Liquid Turf Builder with Plus 2 Weed Control
Scotts Liquid Turf Builder with Plus 2 Weed Control offers a convenient, ready-to-spray liquid formula that targets broadleaf weeds such as dandelion, clover, ground ivy, henbit, chickweed, plantain, and poison ivy, while simultaneously giving your lawn a boost of nitrogen for healthy growth. Designed specifically for when weeds are actively growing, this product delivers a dual-action treatment by feeding your grass and killing listed weeds effectively, making it a strong contender for fast-acting lawn care.
Fertilome St. Augustine Weed & Feed 15-0-4
Fertilome St. Augustine Weed & Feed 15-0-4 combines pre-emergent and post-emergent herbicides with a fertilizer blend tailored for Centipede, Zoysia, and especially St. Augustine grasses. The 15-0-4 formula supports vigorous turf growth while controlling various weeds. However, it is important to note that this product is not suitable for Bermuda Grass or northern grass types, making it a targeted choice specifically for southern and warm-season lawns.
Sunniland Weed & Feed 20-0-6 Lawn Fertilizer for St. Augustine
Sunniland Weed & Feed 20-0-6 Lawn Fertilizer uses easy-to-handle granules that spread smoothly across your lawn. Designed for use on all St. Augustine grass types, it requires just two applications per year, typically in spring and fall. The balanced fertilizer with weed control ensures effective growth stimulation while reducing weed pressure, making it ideal for steady lawn maintenance throughout the seasons.
BioAdvanced 3-in-1 Weed and Feed for Southern Lawns
BioAdvanced 3-in-1 Weed and Feed is formulated with southern lawns in mind, including Bermudagrass and St. Augustinegrass. It delivers up to six months of weed prevention, controlling common broadleaf and grassy weeds such as crabgrass and dandelion. This product also fertilizes and enhances lawn health simultaneously, supporting long-term lawn beauty and resilience with one convenient application.
LESCO 50 lb. St. Augustine Grass Weed and Feed with Penoxsulam
The LESCO St. Augustine Grass Weed and Feed provides a professional-grade 17-0-17 slow-release fertilizer enriched with penoxsulam for weed control. Safe for Floratam varieties, it feeds the lawn for up to eight weeks, promoting sustained turf health. The application requires wet turf and a drying period for optimal results, making it ideal for homeowners seeking long-term nutrient release combined with efficient weed management.
Buying Guide for Liquid Weed and Feed Products for St. Augustine Grass
Choosing the best liquid weed and feed product for your St. Augustine grass lawn depends on several factors to ensure effective lawn care:
Weed Control Spectrum
Select products that target the broadleaf and grassy weeds common to your region, such as dandelion, clover, chickweed, crabgrass, and plantain. Some products offer pre-emergent plus post-emergent control, which helps prevent weed seeds from germinating and kills established weeds.
Fertilizer Composition
Look for fertilizer formulations balanced for St. Augustine grass, typically with higher nitrogen content to encourage rich, green growth. Consider the N-P-K ratio (Nitrogen-Phosphorus-Potassium) based on soil testing and lawn needs.
Application Form and Frequency
Decide between liquid sprays and granular applications. Liquids provide faster absorption and weed control, while granules may offer longer-lasting nutrient release. Frequency can range from single applications with long-lasting protection to multiple treatments during growing seasons.
Grass Compatibility
Ensure the product is specifically formulated or safe for St. Augustine grass to avoid damage. Avoid products designed for different grass types such as Bermuda grass unless indicated safe.
Environmental and Usage Safety
Follow label instructions carefully regarding weather conditions, application timing, and turf moisture. Some products require lawns to be wet before application or need drying periods afterward. Also, consider pet and child safety if applicable.
By comparing these factors among the available products, you can select the most effective liquid weed and feed solution tailored to keep your St. Augustine grass healthy, vibrant, and weed-free.