What Quackgrass (Couch Grass) looks like
Fine-textured grass similar to perennial ryegrass but coarser; flat, grayish-green leaves; distinctive seed heads with spikelets arranged in a zigzag pattern.
Photo: Wikimedia Commons
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Best approach: Herbicide spray
Quackgrass spreads by rhizomes — digging breaks them into pieces that each regrow. Spot-spray with glyphosate and reseed, or use a selective grassy weed herbicide.
When to treat Quackgrass (Couch Grass)
Spot-treat while plants are young and actively growing; mature clumps usually need digging out.
Chemical treatment
Apply a grassy herbicide (fluazifop or sethoxydim) in spring or fall when actively growing. Glyphosate for spot treatment is effective but will kill desirable grass too.
No catalog product confirmed yet
We do not currently have a product in our catalog confirmed for quackgrass (couch grass). Follow the treatment guidance below and check any product label for your turf before applying.
Apply a grassy herbicide (fluazifop or sethoxydim) in spring or fall when actively growing. Glyphosate for spot treatment is effective but will kill desirable grass too.
Use the removal and non-chemical management steps below for this species. A thick, healthy lawn helps resist new invasions; measure your lawn to build a plan that keeps it dense.
Non-chemical management
Prevent rhizome fragments from spreading during renovation; maintain dense, healthy turf.
How to stop Quackgrass (Couch Grass) coming back
Prevent rhizome fragments from spreading during renovation; maintain dense, healthy turf.
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What does Quackgrass (Couch Grass) look like?
Fine-textured grass similar to perennial ryegrass but coarser; flat, grayish-green leaves; distinctive seed heads with spikelets arranged in a zigzag pattern.
What's the best way to kill Quackgrass (Couch Grass)?
Herbicide spray. Quackgrass spreads by rhizomes — digging breaks them into pieces that each regrow. Spot-spray with glyphosate and reseed, or use a selective grassy weed herbicide.
Is Quackgrass (Couch Grass) hard to get rid of?
Quackgrass (Couch Grass) is rated hard to control. It usually requires multiple applications and a consistent plan.
How do I stop Quackgrass (Couch Grass) coming back?
Prevent rhizome fragments from spreading during renovation; maintain dense, healthy turf.
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