Dish soap and oil
This soapy, slippery solution has a high success rate when it comes to killing garden ants.
All you need to do is mix half a teaspoon of liquid dish soap with one and a half teaspoons of cooking oil (olive oil and canola oil work best).
Dilute with around one litre of water and decant into a large spray bottle
Spritz the liquid onto the nest, focusing it directly on entrance points.
Boric acid and sugar
Ants are known for their love of sweet food and liquids, making this method particularly effective
To make the solution, mix boric acid with sugar until it turns into a paste.
Place small amounts of the paste around the entrances to the ant nest to draw the bugs out.
The ants should eat some of the sugary substance and carry the rest back to the nest for the queen.
According to Fantastic Gardeners, the queen and other ants will begin to die shortly after consumption due to the boric acid.
