I live in Oklahoma zone 7 on about 3 acres of sand. I have used cornmeal for years to help with the ant population in my yard. I had a daycare for 23 years so when we found an ant hill in the play area I would put cornmeal around it. I also gave the kids cornmeal to play with in the outdoor kitchen area. The ants take it back to the nest and eat it. Apparently they can't digest it, so they die. I have not ever used it on fire ants. While I have about every other type of ant on my 3 acres I have never come upon fire ants, so I am not sure if it will work for them or not? It's worth a shot though. I have found fire ant nests in nearby parks so I am sure it's probably just a matter of time. They are drawn to my grandson, or he is drawn to them so I am sure if they make their way to my yard- he will happen upon the fire ants. Good luck!
