Ant infestation in lawn


Hi there
We are dealing with a very bad ant infestation in the lawn all around the house. Any exterminator we have called cannot treat lawns and interlock and any landscape company we have found have lawn pestocides but cannot treat for ants.
Is there anyone you can recommend who can do this? We worry it is just a matter of time before the ants make their way into the house.
Thank you.


Thank you for contacting the Toronto master Gardeners.

Unfortunately, Toronto master Gardeners do not recommend specific nurseries or businesses.

Ants prefer dry, well-drained soil in an undisturbed low traffic area. Top-dressing your lawn with plenty of organic matter such as compost yearly will  improve your soil texture and provide nutrients for your lawn. Reseeding your lawn this fall will also help thicken your lawn. For control of ants outdoors, the Ontario Ministry of Environment has approved the use of borax as well as diatomaceous earth for the control of these insects in the garden. Diatomaceous earth is made from the fossilized remains of tiny, aquatic organisms called diatoms. Their skeletons are made of a natural substance called silica. Diatomaceous earth causes insects to dry out and die by absorbing the oils and fats from the cuticle of the insect’s exoskeleton. Its sharp edges are abrasive, speeding up the process. It remains effective as long as it is kept dry and undisturbed. Diatomaceous earth is readily available at your local garden center. Be sure to follow directions on the late;.

 Here is a link to our Gardening Guides on improving your soil and organic pest control for more details. You may also be interested in the Laidback gardeners blog titled: Help! Ants are Destroying my lawn