SedgeHammer - Frequently Asked Questions

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Frequently Asked Questions About SedgeHammer

How is SedgeHammer packaged?
SedgeHammer is available in two package sizes:
1) A 1.3 ounce bottle which is packaged with a small spoon that measures .9 grams of SedgeHammer.
2) A water soluble bag that contains 0.9 grams of Sedgehammer.
The water soluble bag is contained in a metallic outer pouch. Open the metallic pouch and drop the opaque water soluble bag that contains the granules of Sedgehammer into the spray container. Make sure to dissolve completely by shaking, stirring or swirling the solution. The .9 gram water soluable bag will treat up to 1,000 square feet (sq ft).

How do I measure SedgeHammer for a smaller area?
The .9 gm package is intended to be mixed all at once and is not meant to be broken into smaller use amounts.
When should I apply SedgeHammer?
For optimum results it is best to apply SedgeHammer to young, actively growing nutsedge plants (plants that have emerged within the last 6 weeks). SedgeHammer works by killing the foliage and underground tubers. However, nutsedge plants that survive longer than 6 weeks can produce new nutlets. There may also be nutsedge that has emerged and sprouted above ground since the time of your application. SedgeHammer applications must be made consistently to ensure eventual eradication. Read the label for specific directions regarding maximum number of applications and rates.
How long does it take SedgeHammer to work?
Sedgehammer is absorbed into the leaf tissue within 24-48 hours and enters the vascular system. It travels to the base of the leaves where the growing point is located. Critical amino acid production within the plant is then halted. Yellowing and browning of leaves usually occurs within 10-14 days. It may take an additional 2 weeks before the nutsedge dies. If the nutsedge is not actively growing or is stressed in any way, this process may be delayed or interrupted.
How often do I need to use SedgeHammer?
Sedgehammer often works with one application, but depending on the size and age of the nutsedge, multiple treatments may be needed (always read and follow label directions).
What is the shelf-life of SedgeHammer?
Left intact in the original package, SedgeHammer kept in a cool, dry place can be stored for a few years without detrimental effects. Always use SedgeHammer the same day it is blended. SedgeHammer begins to degrade once it is mixed in water.
What is a non-ionic surfactant?

A nonionic surfactant is an additive that aids the penetration of Sedgehammer into the plant tissue. Surfactants are not only used in horticulture but are commonly used in many cleaning products. Their properties enable products to “sheet” or spread across a surface. It is always recommended that a surfactant be used to help SedgeHammer penetrate the waxy layer of the nutsedge leaf. The surfactant also aids in dispersing the water droplets evenly across the leaf tissues and facilitates adsorption into the vascular system of the plant.
For best results, add a surfactant that is specifically made for horticultural purposes and labeled for use with an herbicide. If a nonionic surfactant is not available certain dishwashing detergents that contain high amounts of a nonionic surfactant may be helpful. Check the label of a dish soap to see if it contains a nonionic (not anionic) surfactant. The soap may contain both or just the anionic surfactant. If the label says it contains a nonionic surfactant, that is preferred. Dish soaps that are concentrated and are effective in grease dispersion often contain nonionic surfactants. Add the detergent last and mix by gently swirling together. See the”How to Use” page for more information.
Some commonly used nonionic surfactants are Hi-Yield® Spreader Sticker, No Foam A® , Latron B- 1956®, and X-77®.

Does SedgeHammer need to be watered in?
No, for application on emerged and actively growing nutsedge, watering is not required. It is important that the SedgeHammer mixture completely cover the nutsedge until it glistens.
Will SedgeHammer be safe on my grass?
Sedgehammer is one of the most “gentle- to- turf” products around. It has proven to be safe to most commonly used grasses of North America and has been successfully used for many years. Many other products are safe to only warm season or certain kinds of turfgrass. Turf should be well established with a good root system prior to application.

Can SedgeHammer be used in vegetable gardens
No, SedgeHammer can not be used in vegetable gardens or in or around annual plant beds. It can be used in landscapes around established woody ornamentals as a directed spray on the sedge. Avoid contact of SedgeHammer with the leaves or plant parts of desirable plants.
How long after an application must I wait before
transplanting into a treated area?
The woody ornamental should be transplanted at least 3 months prior to an application. Avoid contact of SedgeHammer with the leaves or plant parts of desirable plants.
Can I use SedgeHammer on a new lawn?
It is recommended that the grass be allowed to establish a good root system prior to applying SedgeHammer. If overseeding, wait a minimum of two weeks before applying. If sodding or reseeding allow at least 4 weeks before an application.
When should I mow my lawn?
For best results, do not mow for two days before or two days after spraying SedgeHammer.
What happens if it rains? When can I water my lawn?
SedgeHammer is rainfast within 4 hours of spraying. Wait 4 hours after application before watering your lawn.
How soon can I resume normal use of my lawn?
It is best to stay off the turf until the spray droplets are dry.
Will SedgeHammer harm my pet?
If used according to label directions, SedgeHammer should not harm pets. Wait until the spray droplets dry before allowing people or pets on your lawn.
What other weeds will SedgeHammer control?
SedgeHammer will also control horsetail (Equisetum arvense) and suppress kyllinga.

Home | About Nutsedge | Product Benefits | Where to Buy | How to Use | Frequently Asked Questions

SedgeHammer™ is a trademark of Gowan Company, LLC. EPA Reg. No. 81880-1-10163. Always read and follow label directions.
Gowan Company specializes in quality products for the agricultural, turf and ornamental industries. Visit the Gowan Company Web Site
Photos courtesy of Louisiana State University AgCenter and Regents University of California

How is SedgeHammer packaged?

SedgeHammer is available in two package sizes:
1) A 1.3 ounce bottle which is packaged with a small spoon that measures .9 grams of SedgeHammer.
2) A water soluble bag that contains 0.9 grams of Sedgehammer.

The water soluble bag is contained in a metallic outer pouch. Open the metallic pouch and drop the opaque water soluble bag that contains the granules of Sedgehammer into the spray container. Make sure to dissolve completely by shaking, stirring or swirling the solution. The .9 gram water soluable bag will treat up to 1,000 square feet (sq ft).

How do I measure SedgeHammer for a smaller area?

The .9 gm package is intended to be mixed all at once and is not meant to be broken into smaller use amounts.

When should I apply SedgeHammer?

For optimum results it is best to apply SedgeHammer to young, actively growing nutsedge plants (plants that have emerged within the last 6 weeks). SedgeHammer works by killing the foliage and underground tubers. However, nutsedge plants that survive longer than 6 weeks can produce new nutlets. There may also be nutsedge that has emerged and sprouted above ground since the time of your application. SedgeHammer applications must be made consistently to ensure eventual eradication. Read the label for specific directions regarding maximum number of applications and rates.

How long does it take SedgeHammer to work?

Sedgehammer is absorbed into the leaf tissue within 24-48 hours and enters the vascular system. It travels to the base of the leaves where the growing point is located. Critical amino acid production within the plant is then halted. Yellowing and browning of leaves usually occurs within 10-14 days. It may take an additional 2 weeks before the nutsedge dies. If the nutsedge is not actively growing or is stressed in any way, this process may be delayed or interrupted.

How often do I need to use SedgeHammer?

Sedgehammer often works with one application, but depending on the size and age of the nutsedge, multiple treatments may be needed (always read and follow label directions).

What is the shelf-life of SedgeHammer?

Left intact in the original package, SedgeHammer kept in a cool, dry place can be stored for a few years without detrimental effects. Always use SedgeHammer the same day it is blended. SedgeHammer begins to degrade once it is mixed in water.

What is a non-ionic surfactant?

A nonionic surfactant is an additive that aids the penetration of Sedgehammer into the plant tissue. Surfactants are not only used in horticulture but are commonly used in many cleaning products. Their properties enable products to “sheet” or spread across a surface. It is always recommended that a surfactant be used to help SedgeHammer penetrate the waxy layer of the nutsedge leaf. The surfactant also aids in dispersing the water droplets evenly across the leaf tissues and facilitates adsorption into the vascular system of the plant.

For best results, add a surfactant that is specifically made for horticultural purposes and labeled for use with an herbicide. If a nonionic surfactant is not available certain dishwashing detergents that contain high amounts of a nonionic surfactant may be helpful. Check the label of a dish soap to see if it contains a nonionic (not anionic) surfactant. The soap may contain both or just the anionic surfactant. If the label says it contains a nonionic surfactant, that is preferred. Dish soaps that are concentrated and are effective in grease dispersion often contain nonionic surfactants. Add the detergent last and mix by gently swirling together. See the”How to Use” page for more information.

Some commonly used nonionic surfactants are Hi-Yield® Spreader Sticker, No Foam A® , Latron B- 1956®, and X-77®.

Does SedgeHammer need to be watered in?

No, for application on emerged and actively growing nutsedge, watering is not required. It is important that the SedgeHammer mixture completely cover the nutsedge until it glistens.

Will SedgeHammer be safe on my grass?

Sedgehammer is one of the most “gentle- to- turf” products around. It has proven to be safe to most commonly used grasses of North America and has been successfully used for many years. Many other products are safe to only warm season or certain kinds of turfgrass. Turf should be well established with a good root system prior to application.