St. Augustine lawns require targeted weed control and balanced feeding to stay thick, healthy, and green. This guide highlights top pest- and nutrient-management products designed for St. Augustinegrass. Each option combines weed control with essential fertilizer, helping you manage crabgrass, dollarweed, clover, and other common yard invaders while boosting turf health. The selections cover both pre- and post-emergent needs, as well as slow-release fertilization compatible with St. Augustine varieties.
| Product | Brand | Size / Coverage | Notes |
|---|---|---|---|
| Fertilome (13917) St. Augustine Weed & Feed 15-0-4 | Ferti-Lome | 25.6 lb | Pre- and post-emergent weed control; tailored for Centipede, Zoysia, and St. Augustine lawns |
| BioAdvanced 3-in-1 Weed and Feed for Southern Lawns (10 lb) | BioAdvanced | 10 lb | For Bermudagrass and St. Augustinegrass; up to 6 months weed prevention |
| Southern Ag Atrazine St. Augustine Weed Killer (1 Gallon) | Southern Ag | 1 gal | Kills broadleaf weeds; suppresses crabgrass; works on St. Augustine and centipede |
| LESCO 50 lb. St. Augustine Grass Weed and Feed | LESCO | 50 lb | Slow-release formula; safe for Floratam; broad feeding window |
| Sunniland St. Augustine Weed & Feed Lawn Fertilizer (5000 sq ft) | Generic | 5,000 sq ft | Easy to spread; two applications per year; suited for all St. Augustine types |
Fertilome St. Augustine Weed & Feed 15-0-4
The Fertilome (13917) St. Augustine Weed & Feed combines a 15-0-4 fertilizer with pre-emergent and post-emergent weed control. It targets Centipede, Zoysia, and St. Augustine grasses while avoiding Bermuda and some Northern grasses. This product aims to reduce weed pressure during critical spring and early growth periods and provides essential nutrients to support turf health. Application timing should align with warm-season turf cycles to maximize weed suppression and fertilizer uptake.
BioAdvanced 3-in-1 Weed And Feed For Southern Lawns (10 lb)
BioAdvanced 3-in-1 Weed and Feed for Southern Lawns is formulated for Southern grasses, including St. Augustinegrass. It offers weed prevention for up to six months and includes a weed killer component targeting common lawn weeds such as dandelion, dollarweed, and clover. This product’s design emphasizes ongoing weed defense while providing nutrition to support lawn vigor, helping you maintain a healthy lawn during peak growing seasons.
Southern Ag Atrazine St. Augustine Weed Killer (1 Gallon)
Southern Ag Atrazine St. Augustine Weed Killer provides targeted control for broadleaf weeds and suppression of crabgrass. It is suitable for use on St. Augustine and centipede grasses, making it a practical option for lawns facing mixed weed pressure. The product is designed to be effective with careful timing to minimize stress on the turf while delivering weed suppression results.
Southern Ag 006130 Atrazine St. Augustine Weed Killer (32 oz)
This 32-ounce Atrazine formulation is designed to treat St. Augustine and Centipede grasses. It covers a substantial area, with one quart ingredient capable of treating thousands of square feet depending on mixing ratios. The product emphasizes weed suppression with a focus on broadleaf species while remaining suitable for warm-season turf management.
LESCO 50 lb. St. Augustine Grass Weed And Feed
Lesco’s 50 lb St. Augustine Grass Weed and Feed is a professional-grade option featuring a slow-release feeding system designed for St. Augustine varieties. Its formula supports a long feeding window and is noted to be safe for Floratam. The product emphasizes fertilizer efficiency and weed suppression with an approach that aims to minimize mowing and boost turf resilience over several weeks.
Sunniland St. Augustine Weed & Feed (5000 sq ft)
Sunniland St. Augustine Weed & Feed offers a practical approach for St. Augustine lawns with easy-to-spread granules. It supports two application periods in spring and fall, aligning with typical warm-season lawn maintenance plans. The product is marketed for use on all St. Augustine types and aims to balance weed control with nutrient delivery to maintain lawn vitality.
BioAdvanced 3-in-1 Weed And Feed For Southern Lawns (20 lb)
BioAdvanced’s 20 lb version of the 3-in-1 Weed and Feed for Southern Lawns targets St. Augustinegrass and Floratam varieties, offering six months of weed prevention along with broadleaf weed control. The larger bag size is suitable for bigger yards or those seeking fewer reorders, with an emphasis on ongoing lawn health and weed suppression for Southern climates.
Buying Guide
When selecting a weed and feed product for St. Augustine lawns, consider the following:
- Weed spectrum: Identify the common weeds in your area (dandelion, crabgrass, dollarweed, clover) and choose a product with proven efficacy against those species.
- Seasonal timing: Warm-season grasses like St. Augustine respond best to spring and early summer applications, with some products offering season-long prevention.
- Grass compatibility: Ensure the product is labeled for St. Augustinegrass or Floratam varieties to avoid turf damage.
- Nitrogen release: Slow-release formulations sustain feeding over weeks, reducing burn risk and mowing frequency.
- Application rate and coverage: Confirm bag size and treated area to avoid under- or over-application; adjust for yard size and soil conditions.
- Pre-emergent vs post-emergent balance: Some products offer both actions; evaluate your weed pressure to determine the right mix.
- Safety and compatibility: Follow label directions, especially on overseeding, irrigation, or near ornamental plants.
- Environmental impact: Consider water runoff and soil health; select products with the least environmental risk for your property.
Overall, the best choice depends on your yard’s specific weeds, lawn size, and regional climate. For broad weed suppression paired with fertilizer for St. Augustinegrass, options from Fertilome, BioAdvanced, Southern Ag, LESCO, Sunniland, and similar brands provide a range of pre- and post-emergent controls and nutrient profiles. Always read the label for application instructions and safety guidance before use.