Hi-Yield Grass Killer Postemergence Herbicide

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Starting at $25.50

Grouped product items
Product Name Price/Ea. Quantity
Hi-Yield Grass Killer-8 oz
Hi-Yield Grass Killer-8 oz
Total: $0.00

Product Information

Hi-Yield Grass Killer Postemergence Herbicide

Hi-Yield Grass Killer with sethoxydim 18.0%, is a systemic, post-emergent, selective herbicide. It lets you spray over desirable plants to kill annual and perennial weedy grasses such as Crabgrass, Bermudagrass, Quackgrass, Foxtails and other weed grasses. For residential use, you may use around flowers, trees, shrubs, ornamental-groundcovers, bedding plants, and some fruits and vegetables (see label for specific crops). See product label for a list of tolerant plants.

Hi-Yield Postemergence Grass killer will stop weed growth within two days. It is a systemic herbicide, going from the leaves and stems to the roots of the weedy grasses to give a complete kill.


  • Mix 2 tablespoons per gallon of water-covers 1,800 sq feet.
  • It is best to use a spreader sticker or surfactant such as, Alligare Surface Surfactant , for better adhesion to the plants.
  • Mix 2 tablespoons of Surface plus 2 tablespoons of Hi-Yield Grass Killer to one gallon of water
  • Apply when grassy weeds are actively growing (not exceeding the minimum of days from application to harvest when used on vegetables and fruits-see label
  • Apply on sunny or warm days to enhance systemic action of Hi-Yield Grass Killer
  • Before spraying, do not mow or cut off tops of weeds.
  • If rainfall is expected within one hour, do not spray

Mode of Action

Hi-Yield Grass Killer causes the grassy weeds to turn yellow and die within one-three weeks, depending on weather conditions, stage of growth and grass species. Heat stress, drought and cool weather slows activity.

Packaging N/A
Product Label Label
Target Pest

Barnyardgrass, Bermudagrass, Broadleaf Signalgrass Crabgrass - Large, Smooth Fall Panicum Foxtails - Giant, Green, Yellow Goosegrass Johnsongrass - Seedling, Rhizome Junglerice Lovegrass Orchardgrass - Seedling Quackgrass Tall Fescue - Seedling Texas Panicum Shattercane/Wildcane Wild Proso Millet Wirestem Muhly Witchgrass Wooly Cupgrass

Note: This product does not control sedge (including Nutsedge or Nutgrass), annual bluegrass, or broadleaf weeds. Red Fescue, Chewings Fescue, Hard Fescue, and Dichondra Turfs are also tolerant to this product.

Active Ingredient (s) Sethoxydim 18.0%
For Use : Intended for residential/homeowner use on and around: Flowers Trees Ornamental- Evergreens Fruits* Groundcovers Shrubs Vegetables* Bedding Plants
Yield 2 tablespoons per gallon covers 1,800 sq ft. Use a surfactant (2 tablespoons) per gallon with the mixture
Mixture|Application N/A
Shipping Restrictions AK, CA, NY
More Instructions
  • WARNING Causes substantial but temporary eye injury. Causes skin irritation. Harmful if absorbed through skin or swallowed. Do not get in eyes, on skin, or on clothing. Wear long-sleeved shirt, long pants, chemical-resistant gloves made of any water proof material, protective eyewear, shoes, and socks. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet. Remove and wash contaminated clothing before reuse.
  • Re-entry Statement DO NOT allow people or pets to come into contact with treated areas until spray has dried. This product is toxic to aquatic organisms.
  • To protect the environment, do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters or surface waters. Applying this product in calm weather when rain is not predicted for the next 24 hours will help to ensure that wind or rain does not blow or wash pesticide off the treatment area. Rinsing application equipment over the treated area will help avoid run off to water bodies or drainage systems.

Frequently Asked Questions


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