The Concern(r) fast-acting weed killer ready-to-use product will help you in your quest for weed control in your yard! This product harnesses the power of ammoniated soap of fatty acids (3.68%), which kill all plant tissue that it contacts including weeds, grass, moss, and algae within hours. Can be used before planting; treated areas may be replanted two days after application. This product will not move through the soil to injure nearby plants or stain, so it's better for your yard and the environment than harsh man-made chemicals that leach to nearby plants.