No it doesn’t kill any of the grass or surrounding plants. It works by sending the energy from the tip of the weed down into the roots of the plants, stopping any growth and causing the weed to die immediately, and die in 10 days. It works amazing; all has been tested for years.
Simply point the light at any weed and zap! Kills weeds in as little as 10 days without the use of harmful or dangerous chemicals.