What are some recommended weed killers for lawns in Ontario?

The Province of Ontario instituted a pesticide ban in 2009, which leaves few options for consumers. Some legal pesticide alternatives include EcoSense Weed-B-Gon and Fiesta Lawn Weed Killer. Both products use iron as the active ingredient, which targets weeds without harming normal grass.

EcoSense Weed-B-Gon helps kill a wide variety of weeds, including dandelion, English daisy and white clover. The weeds dry, turn black and die. Fiesta Lawn Weed Killer is sold in large quantities and suitable for professionals and dealers. Other alternatives include products formulated with acetic acid, sodium chloride or fatty acids. These products are effective for weeds but also tend to kill the surrounding grass.