The Best Grass and Grass Killer The Ortho GroundClear Year Long Vegetation Killer is easily the best weed killer for lawns that delivers long-term results. It contains glyphosate, so many dog owners keep their pets off the lawn for 24 hours. Ortho Ground Clear is as good as Roundup in terms of killing weeds. However, it is known to be the more harmful of the two because it contains both glyphosate and imazapyr.
These chemicals can be quite hazardous to the environment and to the user who is in contact with them regularly. Ortho GroundClear Weed %26 Grass Killer To quickly remove weeds from gravel driveways, patios, and walkways, consider Ortho GroundClear Year Long Vegetation Killer, which can wilt unwanted plants in as little as an hour. The main active ingredient in GroundClear is imazapyr, which is a non-selective herbicide that systematically kills weeds right down to their roots so they don't return. The product also contains pelargonic acid, a contact herbicide that kills green parts of plants for better overall results.