We were given real advice from a someone that had some experience, not just something someone over heard someone telling someone, and in just a few weeks they stopped coming around and now our lawn and the slope to the side walk is all landscaping and not a big ant hill.
We were also surprised that the nursery worker didn’t try to sell us on edusson rating or poisons. Very refreshing to see people putting the environment first.
They told us to just try borax and confectioners sugar mix in equal parts. You just need to keep it from getting wet. We put the mixture in all the places we saw ants and hoped it wouldn’t rain for a day or so. We did that a couple of times, ‘Murphy’s Law’ I guess, but it did work.
Once we got rid of the ants and didn’t see them for a while we dug up the ant hill and replaced it with topsoil and peat moss and re-seeded that area.