What Is Quackgrass and How Do I Control It?
Quackgrass is perennial grassy weed has been plaguing gardeners in the U.S. for roughly 200 years.
Even if you've never heard of quackgrass, chances are you've seen it. This perennial grassy weed has been plaguing gardeners in the U.S. for roughly 200 years and has, fittingly, been called everything from devil's grass to witch's grass. Read on to find out if quackgrass is the villainous weed that has invaded your landscape —then discover how to vanquish it for good.
Although quackgrass is often mistaken for crabgrass, this weedy nuisance is truly its own beast. Like crabgrass, it’s lime green and has a thin, flat, coarse leaf blade, but it can be more challenging to control because its roots run deeper into the soil.
Quackgrass can grow up to 4 feet tall and produce up to 25 seeds per plant that can live for up to 5 years in the soil. In other words, if you don’t take action, you’ll be battling this plant for many years to come. Quackgrass also sprouts from underground stems (called rhizomes) that creep and spread, helping the plant to spread aggressively. Left unchecked, a single quackgrass plant can produce an extensive root system with rhizomes that can spread up to 5 feet in a single growing season.
How to Remove Quackgrass
Just say “no” to hand-pulling.
Don’t waste your time hand-pulling quackgrass. Even the tiniest bit of rhizome left behind in the soil will simply produce more of this tenacious weed.
Kill it with Roundup® Weed & Grass Killer products.
The quickest way to get rid of quackgrass in your garden and landscape beds is by spraying it with Roundup® Ready-To-Use Weed & Grass Killer III. Be prepared, though: Thanks to this plant’s hardy nature and extensive root system, it may require a second application to wipe it out completely.
Another way to kill quackgrass is to smother it with mulch. Adding a 2-3 inch layer of wood chips or laying down landscape fabric or black plastic can help prevent quackgrass from popping up in your garden beds. However, the rhizomes of quackgrass may continue to creep along until they finally find a spot where they can send up a shoot.
If you don't have quackgrass or have just a very small amount of it, do whatever you can to prevent it from making inroads in your yard. It’s crucial to stop this weed early, before it has a chance to mature and cast its evil spell over your yard.