Choosing the right weed and feed for St. Augustine grass helps control common weeds while feeding the lawn. This guide highlights top options available on Amazon, detailing application notes and what to expect for St. Augustine varieties. The selections reflect pre-emergent and post-emergent weed control, nutrient balances, and suitability for Floratam and other St. Augustine cultivars. Use the provided product links to verify current availability and guidelines from the manufacturer.
| Product | Brand | Key Feature | Fertilizer Ratio |
|---|---|---|---|
| Fertilome (13915) St. Augustine Weed & Feed 15-0-4 | ferti-lome | Pre-emergent and post-emergent weed control | 15-0-4 |
| Sunniland Weed & Feed 20-0-6 Lawn Fertilizer | Generic | Easy to spread; spring and fall applications | 20-0-6 |
| LESCO 50 lb. St. Augustine Grass Weed and Feed with Penoxsulam | LESCO | Specially formulated for St. Augustine; slow-release | 17-0-17 |
| BioAdvanced 5 In 1 Weed and Feed | BioAdvanced | Kills tough weeds; prevents new weeds | Various variants |
| Scotts Turf Builder Triple Action1 | Scotts | Three-in-one formula: weed killer, crabgrass preventer, fertilizer | Various |
Note: Always read label directions for your specific St. Augustine cultivar and local climate conditions. The products listed offer a mix of weed suppression and turf feeding, with varying active ingredients and release profiles. For best results, match product choices to your lawn’s weed pressures and ensure compatibility with your grass type and region.
Fertilome (13915) St. Augustine Weed & Feed 15-0-4 (12.8 lbs.)
Brand: ferti-lome
Features: This pre-emergent and post-emergent herbicide controls weeds and provides a 15-0-4 fertilizer mix. The fertilizer is designed for Centipede, Zoysia and St. Augustine lawns and grass types. Do not use this product on Bermuda grasses or any other type of Northern grass.
Sunniland Weed & Feed 20-0-6 Lawn Fertilizer 5000 sq. ft. for St. Augustine
Brand: Generic
Features: Easy to spread granules and easy to handle, 2 applications in the spring and fall, can be used on all types of St. Augustine grasses.
LESCO 50 lb. St. Augustine Grass Weed and Feed with Penoxsulam
Brand: LESCO
Features: Lesco Professional, 50 LB, 13,00 SQFT, 17-0-17 St Augustine Turf Fertilizer, 30% Poly Coated Sulfur Coated Urea, Specifically for St. Augustine Grass; Should be applied when turf is wet, allow to dry; total results in 2 weeks; safe for Floratam variety; slow release providing up to 8 weeks of feeding.
BioAdvanced 5 In 1 Weed and Feed, Granules, 9.6LB
Brand: BioAdvanced
Features: Kills tough weeds; prevents new weeds; controls listed lawn weeds and targets crabgrass; visible results in just 3 days.
Scotts Liquid Turf Builder Lawn Fertilizer
Brand: Scotts
Features: Liquid fertilizer that feeds and helps lawns grow while you water; suitable for all grass types; convenient 2-in-1 application for active turf.
Buying Guide
When selecting a weed and feed for St. Augustine grass, consider these factors:
- Weed pressures: Identify common weeds in your area (dandelions, crabgrass, clover) and choose a product with proven efficacy against those species.
- St. Augustine compatibility: Some formulas are tailored for St. Augustine or Floratam varieties; verify label mentions for St. Augustine before use.
- Pre-emergent vs post-emergent: Pre-emergents prevent weed seeds from germinating, while post-emergents target existing weeds. A combination product can address both, but timing is crucial.
- Nutrient balance: Look at N-P-K ratios to ensure the fertilizer supports healthy growth without excessive top growth; consider slow-release formulas for longer feeding.
- Application method: Granular products require spreaders; liquid options allow easier, uniform coverage but may need more frequent applications.
- Environmental safety: Check for safe use in your climate, turf type, and nearby ornamentals; follow label warnings for irrigation and mowing windows.
- Frequency and duration: Some products provide feeding for several weeks; others offer extended weed control windows. Plan the season accordingly.
- Regulatory and local guidance: Some regions restrict certain herbicides or require specific application guidelines; consult local extension services if uncertain.
In summary, the best choice depends on your lawn’s weed profile, local climate, and whether you prefer granular or liquid formats. For St. Augustine lawns, look for formulations explicitly labeled for St. Augustine or Floratam, with a balanced N-P-K ratio and clear guidance on when to apply for seasonal weed pressure.