Northern Research and Demonstration Farm
Every year extension specialists and farm superintendents invite the public to field days to share the knowledge they have gained in growing a wide variety of annual plants. In 2002, eight research farms participated in growing annual flowers and vegetables for display to the gardening public.
Iowa State University
Haynes, Cynthia L., "2002 Home Demonstration Gardens" (2003). Iowa State Research Farm Progress Reports. 1524.