You may opt to kill your grass lawn due to poor soil quality that causes grass to grow unevenly. Perhaps you want to clear the grass and install a hard surface such as tile or brick that requires less maintenance. Whatever the reason, there are several means of killing any lawn grass successfully.
Wear gloves and mix glyphosate herbicide with water according to the manufacturer's directions. This broad-spectrum herbicide kills grass and other plants it comes into contact with. Spread a tarp or a blanket over plants you do not want to kill.
Pour the mixture into a pump sprayer and spray it evenly over your grass lawn. Bend close to the ground when spraying to ensure good contact between the herbicide and grass, covering it completely. The herbicide penetrates grass tissue and impedes the production of amino acids that assist in growth and development, thus killing it in three weeks.
Opt for an organic solution such as spreading newspapers for killing your grass lawn, especially if you have children or pets. Mow the grass short. Dispose of grass clippings.
Wet the mowed lawn grass lightly to encourage good contact between newspapers and grass. Use a garden hose or sprinklers.
Lay a bundle of 10 to 12 sheets of newspapers over the unwanted grass. Overlap adjacent bundles by 2 to 3 inches on all sides to ensure the grass is fully covered, with no exposure to sunlight, air or water. An alternative to newspapers is to spread a thick, black plastic over your lawn to smother unwanted grass.
Spread an even 3-inch layer of mulch over the newspaper bundles or plastic to weigh them down, so they do not shift or blow away with high winds. You can even weigh the plastic down by placing a rock over each corner. Your lawn grass will die in three to four weeks.