Though you can find several ant poisons for killing them, do not consider using commercial products. Rather you can rely on effective remedies for getting rid of ants in the garden, which are discussed below:
This method of drowning the garden ants with boiling water is practical for a less number of ant colonies. For one ant mound, you require about 3 gallons of boiling water. Accordingly, pour boiling water in the ant hills and kill them.
Collect citrus peelings (orange, lemon, etc.) and ground them by using adequate amount of water. Remove the liquid concoction and spray it over the ant mound. This method is an effective natural remedy for getting rid of carpenter ants and other garden ants.
Spraying a mixture containing borax is effective to kill garden ants. For this purpose, combine equal amounts of borax and sugar and spray the mixture randomly in the garden or wherever you notice garden ants. Sugar attracts the ants to feed on the mixture and the borax kills the ants. By following this method, you will be successful in getting rid of sugar ants.
Grits or hot cereals are a perfect choice for getting rid of ants in the yard and garden. As per your choice, purchase any brand of hot cereal from the market and sprinkle it in the garden, especially in the ant mounds and hills. After ants feed on this hot cereal, it expands in the stomach and kills them.
You don’t believe in controlling ants by using scented baby powder right! I am not kidding, any kind of fragrance is a repelling agent for ants. So, take this advantage and spray baby powder, cinnamon, pepper or vinegar to repel garden ants. Doing so will definitely help you in getting rid of lawn ants.
As already mentioned, ants hate any type of strong odor. The pungent aromatic scent of mint leaves acts a natural pesticide for the ants. So, do not delay in planting mint in your garden so as to get rid of the troublesome ants. The permanent solution for garden ants is to grow and maintain mint plants throughout the year.
In case, these methods do not work, you can use insecticidal sprays. I know it is not a natural way to control ants but, if nothing is working, you can consult professional pest control services and use chemical insecticides for killing garden ants.