How SedgeHammer + Herbicide Works

SedgeHammer + is a water-soluble granule formulation that is mixed with water and applied to target plants with a sprayer. SedgeHammer Plus nutsedge killer herbicide is a member of the sulfonylurea family, an ALS (acetolactate) enzyme inhibiting herbicide. The active ingredient is absorbed into leaf tissue as quickly as 24 to 48 hours after application, then translocated through the plant’s vascular system. The herbicide quickly inhibits amino acids, halting cell division and plant growth in both roots and shoots, causing eventual death in target plants.

SedgeHammer + Target Weeds

Purple Nutsedge, Yellow Nutsedge, Kyllinga

WEEDS CONTROLLED WITH SEDGEHAMMER +: Purple Nutsedge, Yellow Nutsedge, Green Kyllinga, Annual Kyllinga, Cocklebur, common Sunflower, common Ragweed, giant Ragweed, Pigweed, Velvetleaf, Horsetail

Additional weeds controlled with SEDGEHAMMER+ (small packets) only: Burcucumber (suppression), Corn Spurry, Rice Flatsedge, Philadelphia fleabane, Galinsoga, common groundsel (preemergent only), Jimsonweed (preemergent only), Kochia (suppression), Ladysthumb, common Lambsquarter (preemergent only), Venice Mallow (suppression), common Milkweed (suppression), honeyvine Millkweed (suppression), Morningglory (suppression), wild Mustard, redroot Pigweed, smooth Pigweed, common Poweweed, Purslane (preemergent suppression), wild Radish, Shepherds purse (suppression), Pennsylvania Smartweed

Target Uses of SedgeHammer +

SedgeHammer + Herbicide is a selective, post-emergent herbicide concentrate designed specifically to kill nutsedge and other broadleaf weeds without injury to turfgrasses, established ornamentals, shrubs, or trees. This nutsedge killer herbicide can be used in both warm-season and cool-season turfgrasses, landscaped areas, and other non-crop areas.

SedgeHammer + will not prevent germination of most labeled target weeds. Rather, it should be applied to actively growing weeds. If turfgrass or nutsedge is under stress, poor control may result. Also, desirable turfgrass, ornamentals, and trees should be well established before application. Do not apply to edible plants or gardens.

*Note that weeds can develop resistance to herbicides. To minimize the potential for resistance development and/or to control resistant weed biotypes, use a variety of cultural, mechanical, and chemical weed control tactics. Rotate with herbicides having other modes of action.

ACTIVE INGREDIENT: 13.5 g package – Halosulfuron-methyl 5%

SedgeHammer + Application Instructions

SedgeHammer + is a powder concentrate to be diluted with water and applied with a pump sprayer. SedgeHammer Plus nutsedge killer should not be applied with hose-end sprayers since they are far less accurate than hand pump sprayers. When applying, spray the weeds thoroughly and wet the entire leaf surface of the undesirable plants. For best results, spray nutsedge after it has reached the 3 to 8 leaf stage of growth.

SedgeHammer + often works with one application, but depending on the size and age of the nutsedge a second treatment may be required 6 to 10 weeks after the initial treatment. See “Other Tips” below for more information.

The 13.5 gram packets already contain a surfactant, so you only need to mix the contents of the packet itself with a gallon of water. See below for further details. Always read the product label completely before use.

Each 13.5 g packet makes 1 gallon of finished solution and already contains a surfactant. Each gallon of finished solution covers approximately 1,000 square feet. 

Standard Application Dilution rates / Mixing Ratios for SedgeHammer +:

*13.5 g packet – Entire contents of 1 packet (0.5 oz.) per gallon of water – Ideal for spot treatments.  For treating larger areas, consider SedgeHammer Herbicide in the 1.33 oz. bottle.  

• Open and pour entire 13.5g packet into 1 gallon of water in a hand-pump or backpack sprayer
• Shake to mix well (no additives needed)
• Spray on affected areas

SedgeHammer + is for use in the following areas:

Commercial and residential turf and other non-crop sites including: airports, cemeteries, fallow areas, golf courses, landscaped areas, public recreation areas, residential property, roadsides, school grounds, sports fields, landscaped areas with established woody ornamentals, fairgrounds, race tracks, tennis courts, campgrounds, and rights-of-way

Tolerant Turfgrasses – Cool-Season: creeping Bentgrass, Kentucky Bluegrass, fine Fescue, tall Fescue, perennial Ryegrass; Warm-Season: Bahiagrass, Bermudagrass, Buffalograss (Sedgehammer+ only), Centipedegrass, Seashore pasapalum, St. Augustinegrass, Kikuyugrass, Zoysiagrass

Indoors

SedgeHammer + is not labeled for indoor use of any kind.

Outdoors

See general mixing instructions, mixing rates, and application details above.

Established woody ornamentals in landscaped areas – Apply as a post-directed spray. Avoid contact of this product to leaves of desirable plants since foliar injury, discoloration or death may result.

Horsetail Control – SedgeHammer + (small packets): Apply 1 oz. (27 g or 2 pouches) per 1,000 square feet after horsetail has leafed out. SedgeHammer (bottle): Apply 2 2/3 oz. per acre, or 1.8 g per 1,000 square feet.

This rate of product will control horsetail that is less than 6 inches tall and suppress horsetail that is greater than 6 inches tall. Herbicide symptoms are likely to show within 2 weeks as a necrotic ring at the base of the plant, even though the leaves and stems remain green and a deep leathery green in color.

SedgeHammer + Features

• May be tank mixed with Glyphosate herbicides in areas such as rights-of-way or fallow land.
• Convenient pre-measured packets
• Small (13.5 g) packets already contain surfactant.
• Superior control of yellow and purples nutsedges.
• People and pets may return to treatment area once spray is dry.
• Labeled for use in a variety of warm and cool weather turfgrasses.

Extra Tips for Using SedgeHammer +

• For best results, do not mow turf for 2 days before or 2 days after application.
• SedgeHammer + is effective if no rainfall occurs within 3 hours, but best results are obtained with no rainfall or irrigation for at least 4 hours.
• Use only in established turfgrass: allow turf to develop a good root system and uniform stand before application.
• Results may take 5-7 days to begin to appear.
• Do not apply when turfgrass or nutsedge is under stress.
• Do not apply when temperatures exceed 85 degrees F.
• Do not apply to golf course putting greens.
• For transplanted woody ornamentals, allow 3 months after transplanting before applying this product.
• When using in fallow areas, allow 4 weeks between application and transplanting of woody ornamentals or seeding or sodding of turfgrass.
• SedgeHammer may remain active in the soil up to 3 years after application.
• Store concentrate under cool, dry conditions.

Compare to: ProSedge Herbicide