As the owners of a lawn care company, we are often asked many questions concerning lawns. One of the most often asked question is "How can I control quackgrass?"

Quackgrass is one of the toughest weeds within a lawn to control. Quackgrass is a perennial, and as winter approaches it dies back to the rhizomes, and is one of the first weeds to appear in the springtime. The rhizomes or underground stems are what the plant utilizes to produce new grass plants. Because of its aggressive nature and its ability to produce a great many rhizomes, it can quickly take over a lawn. The majority of lawn care companies in our area use a selective, post emergent herbicide to control broadleaf weeds in homeowners' lawns. Because quackgrass is a grassy weed, it is unaffected by these applications.

To control quackgrass, a "non selective" herbicide such as Round-up must be used. Any herbicide containing glyphosate will work. The problem with using these herbicides is that they are NON-SELECTIVE, meaning all growth with chlorophyll in it will die once it comes in contact with the herbicide. We cannot stress this fact strongly enough. If you are determined to use a herbicide with glyphosate to control quackgrass you MUST BE EXTREMELY CAREFUL not to come in contact with any growth other than the quackgrass. If you apply Roundup to the entire lawn to control the quackgrass, your entire lawn WILL DIE. If the affected area is small you may be able to paint the individual quackgrass blades with Roundup. Do not use a spray bottle that can run the risk of drifting onto the surrounding vegetation. Ensure you follow all the instructions supplied by the manufacturer. If the area affected is large, your best bet is to aerate and overseed the area. Eventually the lawn will choke out the quackgrass

For more information, call the professionals at Ace of Blades at 818-LAWN (818-5296),
or e-mail us at paul@aceofblades.ca.