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.
Identification of Wild Onion Plants. Wild onion weeds grow in clumps and are typically found in flower beds or near difficult to mow areas, though they can also grow in lawn. Wild onions can be identified by their thin, waxy spear-like leaves. Wild onion is often confused with its close cousin, wild garlic.o not try to shake excess dirt off back into the hole and do not compost. If you do, this will only respread the wild onion bulblets back into your garden. The next step to kill wild onions is to treat the area with either a non-selective herbicide (like Round-up) or boiling water.