After 37.5 years with the University of Tennessee Extension, Mark Halcomb is really retiring again June 30. Mark served as an Extension Agent in Consumer Horticulture in Shelby County from 1975-1985. He came to McMinnville as an Area Nursery Specialist in January 1986 and has served Warren, Coffee, DeKalb, Franklin, Grundy and Van Buren since that time.