Grass Out Max Herbicide

Grass Out Max Herbicide, manufactured by Agrisel, is a powerful, selective herbicide that targets and kills grasses and grassy weeds while leaving flowers, shrubs, and broadleaf vegetation unharmed. Its broad label offers flexibility and allows users to kill over 50 grasses in many treatment areas.

The primary purpose of this herbicide is to kill annual and perennial grasses where you do not want them, such as in ornamental landscape beds, around trees, and even around broadleaf crops. This is beneficial because grasses and grassy weeds will compete with crops or other desirable vegetation. Grass Out Max will help you eliminate grasses while keeping your flowers, shrubs, or crops safe.

Grass Out Max Herbicide is formulated with the active ingredient Clethodim, which reduces grass growth and eventually kills the targeted grassy vegetation. Symptoms may be seen in as little as a week.

Tools Needed

You will need to use a handheld sprayer, hose-end sprayer, or spray rig. Grass Out Max is intended for large-volume applications, so you may need a high-output hose-end sprayer or professional spray rig.

How to Use

• Step 1: Determine how much Grass Out Max you need by measuring the square footage of the treatment area. Find the square footage by measuring the length and width of the treatment area in feet and multiplying them together (length x width = square feet.) To find acreage, take your square feet and divide by one acre (square footage / 43,560 = sq. ft. Mix rates will vary depending on the targeted weed and the treatment area, but most applications will be 4 to 16 fluid ounces per acre. Spot treatments can be made at a rate of 0.33 to 0.65 oz. per gallon of water. Refer to the label to get the exact labeled rate for your weed and treatment area.
• Step 2: Mix the product in a sprayer by filling it halfway with water, adding the proper amount of Grass Out Max, and then filling it the rest of the way with water and mixing thoroughly. If using Grass Out Max with a tank partner or surfactant, add the additional product and then fill the rest of the way with water.
• Step 3: Apply Grass Out Max evenly over the treatment area, adequately spraying the targeted grasses. Spray to the point of wet, not runoff. Depending on the grass' height, you may need to mow it down to 1 to 8 inches tall. Re-application may be necessary after several weeks, but this will vary depending on the grass and application site. Refer to the label for proper application intervals. 

Where to Use

Grass Out Max Herbicide is for use on broadleaf croplands, rights-of-ways including railroads, highways, roads, dividers, medians, pipelines, public utility lines, pumping stations, transformer stations, and substations; around airports, electric utilities, commercial buildings, manufacturing plants, storage yards, rail yards, fence lines, parkways, post-harvest croplands, beneath greenhouse benches, and around golf courses.

When to Use

Use on calm days when wind speeds are low to minimize drift. For best results, apply Grass Out Max to actively growing weeds and grasses that are at a suitable height.

Apply when rain is not in the immediate forecast for at least 1 hour. For dry areas, apply Grass Out Max immediately after irrigation or within 7 days. 

Safety Information

Grass Out Max is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product. 

Keep people and pets out of treated areas for 24 after spraying. 

Special Considerations

The application rate can vary depending on the grass you are targeting and the application site. Be sure to read the label carefully when applying to broadleaf cropland for specific application rates.