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.
Other Uses: juice acts as a weak insect repellent. Dangers: Toxic Crows Poison plants look just like wild onion but only wild onion smells like onion. If it smells like onion it is safe to eat, if it just smells like grass it is toxic Crow's Poison (Nothoscordum bivalve). A bunch of wild onions. A single wild onion plant. Wild onion flowers and seeds. Close-up of Wild Onion flowers and seeds. Wild onions form large beds of plants which drive out other plants.