*Talcum powder - sprinkle around plants or over the nest if you can find it.
*Borax - make a mix of 6 parts of sugar to1 part of borax, using a little water to first dissolve the borax. Honey can be added to make it into a paste. Place on something that can be covered so pets and children can’t get to it. The ants will be attracted to the sugar/honey and take it back to their nest where the borax will kill them. It damages their digestive systems and skeletons.
*Coffee grounds - sprinkle around to repel ants
*Cucumber and citrus peel - chop them up together and scatter around the base of the plants These are toxic to fungi that ants feed on so ants instinctively avoid them.
*Bone meal - sprinkle around to repel ants. They hate the smell.
*Spices – cinnamon, powdered curry or chilli sprinkled around plants in an unbroken line.
*Diatomaceous earth- apply around the stem of the plant. DE pierces their exoskeletons causing dehydration and will also lodge in their leg joints, disabling and eventually killing them.
*Place sawn-off milk cartons around the plants as a physical barrier
NB talcum powder, borax mix and diatomaceous earth will all wash away with the rain.