Experts predict most of Tennessee is suitable for fire ant survival. Recent research from The University of Tennessee indicates the hybrid form found in East and parts of Middle Tennessee is more cold-tolerant than either parent species (the red or black imported fire ant). Therefore, we must learn how to manage these pesky ants. Once fire ants are established in an area, weʼll need to apply the two-step method twice a year.
"SP419-The Two-Step Method: Managing Fire Ants Around Homes and In Neighborhoods," The University of Tennessee Agricultural Extension Service, SP419-5M-1/05(Rev) R12-0180-010-001-04, https://trace.tennessee.edu/utk_agexcomhort/2