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.
You should order and grow enough onions so you have some for eating and some dedicated for seed saving. Onions can cross, so it's best to start with one variety at a time. Plant your onion seed and do not pick or eat the ones you intend to harvest for seed. At the end of the growing season when the onion tops are brown, drying and bent over, harvest the onion bulbs. This should be done before the first frost. Do NOT wash the onions, however you can shake the dirt off.