I have been scattering used coffee grounds over my entire yard and shrub and flower beds for years. I have eliminated red ants from my lawn entirely. It does keep the squirrels away somewhat. It also repels most other ants. I dry them out in the filter on an aluminum pie plate, then when dry put them in a bucket. When I have a good amount I scatter them around my yard.
I have been scattering used coffee grounds over my entire yard and shrub and flower beds for years. I have eliminated red ants from my lawn entirely. It does keep the squirrels away somewhat. It also repels most other ants. I dry them out in the filter on an aluminum pie plate, then when dry put them in a bucket. When I have a good amount I scatter them around my yard.