Cement is a fine, soft, powdery-type substance. It is made from a mixture of elements that are found in natural materials such as limestone, clay, sand and/or shale. When cement is mixed with water, it can bind sand and gravel into a hard, solid mass called concrete.
Overview. While onions may be welcome in your vegetable garden, they are considered weeds in your lawn. Onion grass, a type of wild onion, often flourishes in yards, particularly in the southeastern region of the U.S. Like most common lawn weeds, onion grass can be eliminated with commercial herbicides and weed killers.tep 2. Cut onion grass very short to prevent flowering. Onion grass reproduces by flowering and seeding. By cutting onion grass to the same height as your lawn grass, you can stop it from spreading.
Water the flowerbed with 1/2 to 1 inch of water, moistening the soil deeply enough to reach the wild onions' roots. Grab each wild onion plant at its base, and pull it upward from the soil.Remove all of the plants' bulbs and roots left in the soil by using a trowel.Spread the garden bed's soil to smooth the soil where the plants were removed, or use new soil to fill holes that resulted from the plants' removal.. Trim the wild onions to the ground repeatedly. The trimmed plants' foliage is unable to photosynthesize, or turn sunlight into energy. This method works better when the wild onions grow in a lawn because they can be mowed with the grass, but pruning shears can be used to trim the wild onions in a flowerbed.