What is Quackgrass? Agropyron repens
Lawns across Ann Arbor, MI are infested with a troublesome weed grass called quackgrass, sometimes referred to as couch or twitch grass.
Quackgrass is faster growing and lighter green in color than desirable lawn grasses such as Kentucky Bluegrass.
- Weak lawns are ideal sites for the invasion of unsightly quackgrass.
- Infrequent grass cutting and poor watering habits encourage Quackgrass invasion.
- Quackgrass also thrives in undernourished, weak lawns and will quickly spread throughout the lawn.
- Quackgrass reproduces most often by vigorous underground stems called rhizomes.
- Few people are aware of quackgrass invasion until desirable grasses such as Kentucky Bluegrass are crowded out.
- Quackgrass gives the lawn a coarse uneven appearance.
There are no selective weed control materials for quackgrass. The most effective procedure for control and/or suppression of quackgrass is to "stunt it out" or "crowd it out". This is accomplished by:
- applying a good fertilizer program, such as Weed Man slow release granular fertilizer, to the lawn in order to thicken desirable lawn grasses.
- in addition, the lawn must be cut frequently (every 3-4 days) at a slightly lower height than is normally recommended, approximately 1 ½ to 2” (4-5 cm).
These procedures have the effect of stunting the taller growing quackgrass. Desirable grasses will then begin to crowd the stressed quackgrass and will ultimately result in a vigorously growing, healthy green lawn.
Patience and diligence are essential ingredients in this procedure. It may take 2-3 years to control quackgrass naturally. Ask your Ann Arbor, MI Weed Man for tips on watering.