Horticultural organizations often focus on specific horticultural crops interests and offer additional information and support. For answers to general horticulture questions Iowa State University maintains a horticultural hotline at 515-294-3108 or you can check with your local county extension office. The Iowa State University Plant and Insect Diagnostic Clinic helps Iowans diagnose and manage plant disease, weeds and insects.
Iowa Master Gardener Program
www.mastergardener.iastate.edu/
Iowa Nut Growers Association
515-733-2674
Iowa State Horticultural Society www.iowahort.org/