Killing weeds with a tarp is one of the most environmentally friendly ways to kill weeds. This is because it simply kills the weeds by blocking out sunlight and preventing them from growing. After you master the technique of killing weeds with a tarp, you may never have to buy weed killer again.
Find a plastic tarp that is large enough to cover the area of weeds you wish to kill.
Drag the tarp over the area of weeds you wish to kill. Make sure to cover the area completely so that all sunlight is blocked out from the weeds. The tarp will not only kill the weeds that are currently alive, but it will also prevent new weeds from growing by preventing the seeds from receiving sunlight.
Wait several weeks before removing the tarp to ensure that all of the weeds die.