Answering the common question, 15-0-15 weed and feed products combine a balanced nitrogen–phosphorus–potassium mix with broadleaf weed control. This guide highlights five options that emphasize lawn greening, weed suppression, and compatibility with common American grasses. Each product targets specific grass types and weed concerns, helping you choose the right match for your yard.
Overview: Top picks in this guide are selected for versatility, application ease, and weed-control breadth. The summary table below compares the five products, focusing on grass adaptability, weed control targets, and formulation type (granular vs. liquid). Use this as a quick reference when deciding which product to buy.
| Product | Formulation | Best For | Notes |
|---|---|---|---|
| Fertilome (13926) Centipede Weed & Feed 15-0-15 | Granular | Centipede lawns seeking broadleaf weed control | Controls 200+ broadleaf weeds; slow-release nitrogen; iron-rich |
| Superior 15-0-15 Liquid Lawn Fertilizer (Simple Lawn Solutions) | Liquid | All grass types needing quick greening and growth boost | Contains humic, fish and seaweed additives for vigor |
| Fertilome (13917) St. Augustine Weed & Feed 15-0-4 | Granular | St. Augustine and related warm-season grasses | Pre- and post-emergent weed control with 15-0-4 fertilizer |
| GORDON’S Tankables® Weed & Feed 15-0-0 | Synthetic liquid concentrate | Pastures and lawns needing broadleaf weed control | High coverage; treats large areas; no grazing wait when applied alone |
| Weed & Feed Liq Conc2.5g2 | Liquid concentrate | General weed and feed needs | Compact product with liquid formulation for easy mixing |
Fertilome Centipede Weed & Feed 15-0-15
Best for Centipede lawns needing both broadleaf weed control and a balanced fertilizer. Features include control of 200+ broadleaf weed types and post-emergent weed control. The slow-release nitrogen plus high iron content supports steady greening. Caution: Avoid use on Bermuda grass and other Northern grass varieties if not labeled for your region.
Superior 15-0-15 Liquid Lawn Fertilizer
Best for all grass types needing fast, even greening and growth. The 15-0-15 ratio balances nitrogen and potassium with humic, fish, and seaweed nutrients to support turf hardiness. This liquid formula is easy to apply with an attached sprayer. Caution: Avoid application on drought-stressed lawns; follow label rates for best results.
Fertilome St. Augustine Weed & Feed 15-0-4
Best for St. Augustine and similar warm-season grasses requiring pre-emergent plus post-emergent weed control with a 15-0-4 fertilizer. Not recommended for Bermuda or some Northern grasses. The product supports weed suppression while feeding the lawn. Caution: Check for suitability on your grass type before use to avoid turf sensitivity.
GORDON’S Tankables Weed & Feed 15-0-0
Best for large lawns and pastures needing broadleaf weed control with green-up. A single bottle treats up to 15,000 sq. ft. for pastures or up to 20,000 sq. ft. for lawns. Uses a liquid concentrate that is easy to mix. Limitation: The 15-0-0 formulation has no phosphorus, so it’s more suited for existing phosphorous-rich soils or where starter phosphorus is unnecessary.
Weed & Feed Liq Conc2.5g2
Best for compact, ready-to-mix weed and feed needs with a liquid concentrate format. Suitable for quick application and broadweed suppression. Caution: Product details vary by batch; verify current label instructions and grass compatibility before use.
Buying Guide
What to consider before choosing 15-0-15 weed and feed
- Grass type: Warm-season vs cool-season grasses respond differently to weed control and fertilization. Note labeled grass recommendations for each product.
- Weed target: Identify the primary weeds in your lawn (dandelions, clover, dollar weed, etc.) and choose a product with proven control for those species.
- Formulation: Granular products typically offer slower release and longer intervals between applications, while liquids provide immediate greening and easier uniform coverage.
- Application timing: Many products work best in spring or fall for broadleaf weed control and turf recovery. Follow product-specific timing guidance.
- Safety and usage: Read labels for restrictions, such as weather conditions, irrigation windows, and pet or child safety in treated areas.
Granular vs. Liquid: Which should you choose?
- Granular weed & feed: Often suitable for established lawns needing steady growth and weed suppression. May require watering after application for activation.
- Liquid weed & feed: Provides fast greening and uniform coverage, especially useful for larger or uneven lawns. Requires a sprayer and more careful mixing.
Regional considerations
- St. Augustine and centipede lawns often require products labeled for warm-season grasses to avoid turf injury.
- Bermuda and northern grasses may have different weed-control sensitivities; always check the label’s grass compatibility.
Usage tips for better results
- Follow label rates precisely to minimize turf stress and ensure effective weed control.
- Watering after application can help activate some granular products and reduce burn risk.
- Apply when weeds are actively growing for best post-emergent control.
FAQ
- What does 15-0-15 mean? It indicates the fertilizer’s nitrogen-phosphorus-potassium ratio, with nitrogen and potassium balanced for growth and vigor.
- Can I use these on cool-season grasses? Yes, but verify each product’s labeled grass types to ensure compatibility.
- Do these products kill all weeds? They target many broadleaf weeds but may not control all weed species; check the label for specifics.
- When is the best time to apply weed and feed? Typically in spring or fall when weeds are actively growing and temperatures are moderate, per label directions.
- Are there safety concerns for pets or children? Follow label guidance regarding restricted zones and re-entry times after application.
- Do I need to mow before applying? Generally, mowing before application can improve product contact with weeds, but follow label instructions.