Certainty Herbicide - 1.25 oz -Sedge and Poa Annua Control

  • $130.99
  • $125.99

Looking for the answer to Poa annua, dandelions and nutsedge in your warm-season lawn? Then look no further than Certainty herbicide. It's easy to apply,  eliminates weeds fast, and is safe for your warm season grass. Certainty helps you say "goodbye!" to hard-to-kill weeds in your Bermuda, St. Augustine,  and Zoysia lawn.

  • Fast Poa annua, sedge, and grassy weed control
  • Can be safely applied over broad temperature range
  • Control difficult weeds without fear of damaging turf
  • Covers up to 72,000 square feet

Package Includes: One 1.25 oz bottle and measuring spoon

Certainty Kit Includes: One 1.25 oz Certainty bottle, Surfactant, Blue Marker Dye

Storage: Store in a cool dry place away from direct sunlight.

If you've wondered "How do you kill Poa Annua without killing grass?", then Certainty is the answer. We've used it effectively in both broadcast applications and spot treatments. Certainty Turf Herbicide is easy to use, kills weeds and won't harm your lawn.

Check out how we combined it with Celsius WG Herbicide for the ultimate weed killing combo.

Certainty can be used on the following grass types: 

Warm Season Lawns

Label: Certainty Turf Herbicide Product Label

SDS: Certainty Herbicide Safety Data Sheet

ApplicationThis is a professional formulation and should be applied from Battery-powered 4 gallon sprayer with  TeeJet foliar spray tipThis herbicide is not to be applied via a hose-end sprayer. 

When to Apply: Do not apply if temperatures are over 100F. If temps are that high, apply in the evening when they dip below 100F and elect to spot spray instead of blanket spraying.

Coverage: 43,500 to over 72,000 sq. ft. depending on targeted weed.

Application Rates:

For sedges and kyllinga 3 - 5 small scoops per gallon of water over 1,000 sq. ft.

For poa annua, 1 large scoop per gallon of water over 1000 square feet.

Use a non-ionic surfactant with Certainty for best results. Non-ionic surfactant helps the herbicide stick to the weeds better. 

Do not mow immediately after treating with this product or before spray has dried. After treatment, do not transfer clippings to non-target areas.

Application sites:

For use in Golf Courses, Sod Farms, Highways, Right-of-Ways, and similar Non-Crop areas, Ornamental Turf-grass (Residential & Commercial), Parks, Cemeteries and Athletic Fields

Additional Notes:

Some products may not be registered for sale or use in all states or counties and/or may have state-specific use requirements. This information is for reference only. It is the responsibility of the user to verify the product is registered and appropriate for use in a given state.  Please check with your local extension service to ensure registration status and proper use. 

Which grass types is this Certainty safe for?

  • Certainty is safe for all warm season grasses.

Does Certainty need to be watered in?

  • No. Certainty works via foliar uptake. Simply spray the weeds you're targeting and allow it to dry.

Can I apply granular fertilizer or Essential-G on the same day as Certainty?

  • Yes. We recommend that granular fertilizer and Essential-G be applied before Certainty.

Can I apply other liquids and Certainty on the same day?

How long does it take for weeds to die after spraying with Certainty?

  • It depends on the weed being targeted and temperature. Most weeds begin to yellow within 14 days of application.

Should I use surfactant with Certainty?

  • Yes. For best results we recommend using a surfactant with Certainty. 

Are there temperature restrictions with this product?

  • No. We don't recommend spraying your lawn with Certainty when temperatures exceed 90F as temporary injury may occur.

How long should I wait before resuming mowing?

  • For best results do not mow 2 days before application and 2 days after. For example, if you plan to spray Certainty on Saturday, your last mow would be on Thursday. You would resume mowing on the following Tuesday.


Shipping: United States Only.

Currently NOT shipping to:(AK,HI, DC). For AZ,CA just a small shipping charge of $3.00 will be applied.

We can not ship to PO Boxes

Typically delivered in 4 - 7 business days.

Cancellations | Returns | Exchanges: All sales are final, no cancellations, returns, or exchanges