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Don't Mistake This Common Weed For Grass In
Your Lawn
By CORINNA UNDERWOOD
Although it resembles grass, knotgrass is an invasive plant that poses a serious threat to your lawn by spreading rapidly and forming dense mats that can suffocate your yard.
This perennial weed is recognizable by its green, slender, pointed leaves that grow parallel to the stem, along with tiny, greenish-white flowers that bloom in July and August.
Once knotgrass takes hold, it becomes difficult to control due to its aggressive spread through horizontal underground stems, which enable it to quickly overrun large areas.
To protect your lawn, it is crucial to remove knotgrass by digging it out to a depth of at least 1 ¼ inches, making sure to remove all roots to prevent it from growing back.
For larger infestations, applying a glyphosate herbicide to the leaves may be necessary. If left unchecked, it will return every year, gradually overpowering even the densest turf.