Kill Existing Weeds
Certainty HerbicideCertainty Herbicide
Certainty
At a glance
- Grass types
- Compatibility not yet confirmed. Check the product label.
Why use it—and how?
AI automatically looks up why and how to use Certainty Herbicide for St. Augustine, using product and lawn-care sources.
Certainty Herbicide is a selective, post-emergent herbicide containing the active ingredient sulfosulfuron. It is designed to control specific tough weeds, such as nutsedge and certain grasses, in established warm-season turfgrasses, including St. Augustinegrass.
Is it right for St. Augustine?
According to the manufacturer's label information, Certainty is labeled for use on St. Augustinegrass. However, St. Augustinegrass is known to be sensitive to many herbicides, and cultivar-specific sensitivity (such as with Floratam) can occur. You must verify the specific label on your container to ensure it does not list restrictions for your particular variety of St. Augustinegrass.
Why use it?
You would use this product only if you have identified a specific weed problem that this herbicide is labeled to control. It is unnecessary if you do not have a target weed infestation. Using herbicides unnecessarily increases the risk of turf injury and environmental impact.
How to approach using it
- Identify the specific weed species in your lawn to confirm it is listed on the product label as a target weed.
- Read the entire product label on your specific container to understand all safety precautions, environmental restrictions, and application requirements.
- Ensure you have the proper personal protective equipment (PPE) as required by the label before handling the product.
- Follow the label's specific instructions for mixing and application, as improper use can damage your St. Augustinegrass.
Before you apply
St. Augustinegrass is highly sensitive to many chemical applications. Never apply a herbicide without first confirming the weed identity and reading the product label for your specific grass type. If the label does not explicitly state it is safe for your lawn, do not apply it. Always prioritize the instructions on your physical product label over any general advice, as label directions are the legal requirement for use.
Sources to review
AI can make mistakes. This is educational guidance—not a diagnosis or an application prescription. Always follow your exact product label for rates, restrictions, and safety.
AI guidance ready. Review the sources above and your product label.
How I’d Use It
Use the sourced guidance below for application context. Confirm rates, timing, watering, and grass restrictions on your exact product label before applying.
View how-to guidanceTools I’d Use With This Product
Where to buy
Product details
- Full product name
- Certainty Herbicide
- Manufacturer
- Certainty
- Category
- Kill Existing Weeds
- Application unit
- lb
Always follow the product label. Label rates, grass restrictions, timing, and safety precautions take priority over this guide.