Earl May started KMA 960 AM to help promote his seed and nursery business. KMA hit the ariwaves on August 12, 1925.
May built the station headquarters and Mayfair Auditorium (demolished in 1964 due to it being declared structurally unsafe by the Iowa State Fire Marshal) across the street from the nursery business. Between music sets, May would pitch his seeds and tell nostalgic stories. May won "Radio Digest" gold cup for being voted the "World's Most Popular Radio Announcer" by over 452,000 people throughout the United States in 1926.