The first signs of spring are a delight for most gardeners, but if you look out over your lawn and see the long, slender leaves of wild onions growing above the grass, you may feel more than a little disheartened. The wild onion grows as a perennial bulb under the soil and can spread to more areas of the yard if not stopped. While it will take regular treatments for a few years, it is possible to eradicate wild onion from your lawn. Take action when you see spring growth rising above the grass.
Tie the ends of your rope to each end of the board. Hold onto the rope and drag the board over the wild onions to scuff up the surface of the leaves to keep your herbicide from running off.
Apply an herbicide with 2, 4-D plus dicamba, following the directions for strength and application of the herbicide on the packaging. Follow any precautions of the herbicide as well for safe use around children and/or pets. Repeat this step in mid-fall when the leaf portion of the onions is gone but the bulb under the surface is still tender.
Treat the wild onions each year in the spring and fall for the next two to three years until you no longer see the wild onions coming back. Begin again if you see wild onions creep back into the yard.