3-Way Lawn Weed Killer
3-Way Lawn Weed Killer
3-Way Lawn Weed Killer, manufactured by CSI, is a liquid post-emergent herbicide that eliminates selective broadleaf weeds in cool-seasoned and warm-seasoned turfgrasses within golf courses, sod farms, home lawns, and other non-crop sites.
This multi-purpose product combines three active ingredients 2,4-D 30.56%, mecoprop-p 8.17%, dicamba 2.77% which gives controls over 33 types of broadleaf weeds such as ground ivy or ragweed.
3-Way Lawn Weed Killer is a low odor product that can easily be applied to numerous sites through spot or broadcast applications.
Tools Needed
To use 3-Way Lawn Weed Killer, you will need either a handheld pump sprayer or backpack sprayer. For spot applications, use a handheld pump sprayer. Broadcast applications may be done with a backpack sprayer.
Aerial application is prohibited. This product cannot be applied through any type of irrigation equipment.
How to Use
- Step 1: For best results, turf should not be mowed for 1 to 2 days before and after application. Determine how much 3-Way Lawn Weed Killer to use by calculating the square footage of the treatment site. To find this, measure the length and width of the treatment area in feet and multiply (length X width = square footage). For acreage, take the square footage and divide it by one acre (square footage / 43,560 = acre). The application rate for cool-seasoned grasses and listed warm-seasoned grasses is 1.1 to 1.5 oz. of 3-Way Lawn Weed Killer per 0.5 to 5 gallons of water per 1,000 sq. ft. For acreage applications of cool-seasoned grasses and listed warm-seasoned grasses use 3 to 4 pints per 5 gallons of water per acre. For dormant St. Augustine and Centipedegrass, apply 0.75 to 0.9 oz. of product per 0.5 to 5 gallons of water per 1,000 sq. ft. Acreage applications for dormant St. Augustine and Centipedegrass, will use 2 to 2.5 pints of product per 4 gallons of water per acre. Refer to the label for specific application rates for ornamental turf and those grown for seed or sod.
- Step 2: Fill your sprayer halfway with the required amount of water, add the measured amount of 3-Way Lawn Weed Killer, and then pour in the remaining half of water. Agitate the sprayer until solution is evenly-mixed.
- Step 3: Spray the top and bottom of leaves and stems until wet, but not to the point of run-off. Avoid overapplication of treated areas to prevent turf injury. Reseed no-sooner than 3 to 4 weeks after application of this product.
Where to Use
3-Way Lawn Weed Killer may be used in turfgrasses on golf courses (fairways, aprons, tees, roughs), sod farms, highways, right-of-ways, residential lawns, industrial lawns, institutional lawns, ornamental turfs, parks, cemeteries, athletic fields, turf grown for seed or sod, and non-cropland (fence rows, hedge rows, roadsides (including aprons and guardrails), ditches, right-of-ways, utility, power lines, railroads, airports, and industrial sites).
Do not use this product in or near greenhouses or within 25 feet of rivers, fish ponds, lakes, streams, reservoirs, marshes, estuaries, bays, and oceans. You may also not spray on newly seeded grasses until well-established.
Avoid product mist to vegetables, flowers, ornamentals, shrubs, trees, and other desired plants. Do not pour spray solutions near these plants.
When to Use
Use 3-Way Lawn Weed Killer when grass is well-established and weeds are actively growing, preferably in May or mid-August through September. Apply on calm, days where temperatures are low (below 80 degrees Fahrenheit) and when rainfall is not predicted for at least 4 hours after application.
Apply only to dormant St. Augustinegrass (common, Raleigh, and Seville varieties grown in TX, LA, MS only) and dormant centipedegrass (TX, LA, MS only).
Safety Information
3-Way Lawn Weed Killer is safe to use around children or pets when applied according to the product label instructions. Always wear the appropriate personal protective equipment (PPE) when mixing or applying this product.
Do not enter or allow workers to enter treated areas until 48 hours have passed after first application.
Do not allow people (other than applicator) or pets on treatment area during application or enter treated areas until sprays have dried.
Special Considerations
For use by turf maintenance personal, landscaping, or commercial applicators only.
Slight yellowing of turf may appear, but will disappear in about one week.
Some hybrid bermudagrass may be sensitive to this product.
Availability | Online |
Restricted Use | No |
Shipping Restrictions | 1 Gallon: AK, AZ, CA, CT, HI, IN, MI, MS, NY, OR, RI, SC, VT, WA 32 Ounce: AK, AZ, CA, CT, HI, IN, MI, MS, NY, OR, RI, SC, VT, WA |
Brand | CSI |
Keith's Pro Tips | "To prevent product run-off and minimize turf injury, do not overwater the treated areas or apply when raining or when rain is expected that day." |
Product Drawbacks | 3-Way Lawn Weed Killer may cause temporary discoloration or turf injury. |
Target Pests | Bedstraw, Black medic, Buckhorn, Burdock, Chicory, Chickweed, Clover, Dandelion, Dock, Ground-ivy, Heal-all, Henbit, Knotweed, Lambsquarters, Lespedeza, Mallow, Morningglory, Peppergrass, Pigweed, Plantain, Poison Ivy, Poison Oak, Purslane, Ragweed, Sheep Sorrel, Shepherdspurse, Speedwell, Spurge, Wild Carrot, Wild Garlic, Wild lettuce, Wild onion, Yarrow and other broadleaf weeds. |
Application Equipment | Pump Sprayer |
Application Methods | Spot Treatment |
Active Ingredient | 2,4-D 30.56%, Mecoprop-p 8.17%, and Dicamba 2.77% |
Product Type | Herbicide |
Formulation | Emulsifiable Concentrate (EC) |
Application Rate | For cool-seasoned grasses and listed warm-seasoned grasses, use 1.1 to 1.5 oz. of 3-Way Lawn Weed Killer per 0.5 to 5 gallons of water per 1,000 sq. ft. Dormant St. Augustine and dormant Centipedegrasses, apply 0.75 to 0.9 oz. of product per 0.5 to 5 gallons of water per acre. Apply 3 to 4 pints per 5 gallons of water per acre of cool-seasoned grasses and listed warm-seasoned grasses. Dormant St. Augustine and dormant Centipedegrasses, use 2 to 2.5 pints of product per 4 gallons of water per acre. |
Shelf Life | 3-Way Lawn Weed Killer will last for 3 years when stored in its original container away from freezing temperatures, water, food, and feed. |
Yield | One quart of 3-Way Lawn Weed Killer will treat up to 1 acre. |
Use Sites | Outdoors |
Time to Kill | 3-Way Lawn Weed Killer will display discoloration of weeds then eventual death within several days of application. |
Comparable Products | 3 Way Max Turf and Ornamental Broadleaf Herbicide |
Incompatible Grass Types | St Augustine, Zoysiagrass |
Incompatible Home Siding | Brick, Hardie Plank, Stone Veneer, Wood, Vinyl |
EPA Registration # | 53883-378 |
Restricted Use | No |
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Shipping Restrictions | AK, AZ, CA, CT, HI, IN, MI, MS, NY, OR, RI, SC, VT, WA |
Availability | Online |
Signal Word | DANGER |
Keith's Pro Tip | "To prevent product run-off and minimize turf injury, do not overwater the treated areas or apply when raining or when rain is expected that day." |
Target Pests Multi | Bedstraw, Black Medic, Buckhorn, Burdock, Chickweed, Clover, Dandelion, Dock, Healall, Henbit, Knotweed, Lambsquarters, Lespedeza, Mallow, Morningglory, Peppergrass, Pigweed, Plantain, Poison Ivy, Poison Oak, Purslane, Ragweed, Sheep Sorrel, Shepherdspurse, Speedwell, Wild Carrot, Wild Garlic, Wild Lettuce, Wild Onion, Yarrow, Chicory, Ground Ivy |
Time to Kill | 3-Way Lawn Weed Killer will display discoloration of weeds then eventual death within several days of application. |
Chemical Type | Herbicide |
Formulation | Emulsifiable Concentrate (EC) |
Application Methods | Spot Treatment |
Product Drawbacks | 3-Way Lawn Weed Killer may cause temporary discoloration or turf injury. |
Active Ingredient | 2,4-D 30.56%, Mecoprop-p 8.17%, and Dicamba 2.77% |
Application Equipment | Pump Sprayer |
Mix Rate | For cool-seasoned grasses and listed warm-seasoned grasses, use 1.1 to 1.5 oz. of 3-Way Lawn Weed Killer per 0.5 to 5 gallons of water per 1,000 sq. ft. Dormant St. Augustine and dormant Centipedegrasses, apply 0.75 to 0.9 oz. of product per 0.5 to 5 gallons of water per acre. Apply 3 to 4 pints per 5 gallons of water per acre of cool-seasoned grasses and listed warm-seasoned grasses. Dormant St. Augustine and dormant Centipedegrasses, use 2 to 2.5 pints of product per 4 gallons of water per acre. |
Low Use Rate | 0.017 oz./1,000 sq. ft. |
High Use Rate | 1.45 oz./1,000 sq. ft. |
Use Sites | Outdoors |
Yield | One quart of 3-Way Lawn Weed Killer will treat up to 1 acre. |
EPA Registration No. | 53883-378 |
Shelf Life | 3-Way Lawn Weed Killer will last for 3 years when stored in its original container away from freezing temperatures, water, food, and feed. |
Comparable Products | 3 Way Max Turf and Ornamental Broadleaf Herbicide |
Children or pets? | Yes |
Property Characteristics | None |
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Q:Can it be used on Seashore Paspaum grass?3/13/23A:3-Way Lawn Weed Killer is not labeled to be used on seashore paspalum.
Amanda Chavez
3/14/23Certified Buyer -
Q:How much do I mix with 1gallon of water?8/28/22A:The application rate for cool-seasoned grasses and listed warm-seasoned grasses is 1.1 to 1.5 oz. of 3-Way Lawn Weed Killer per 0.5 to 5 gallons of water per 1,000 sq. ft. Refer to the product label for more specific application rates.
Amanda Chavez
8/29/22Certified Buyer -
Q:The mixing instructions seem pretty broad in terms of how much to dilute the product. Can you be more specific about the number of gallons of water to use? 0.5 to 5 gallons is big range6/26/22A:I mix 3 oz to 1 gal of water. Works well for spot spraying or tank. I
Rick DeSantis
6/26/22Certified Buyer