American Floral Endowment

Cornell University's Plant Disease Diagnostic Clinic - Site developed by Cornell University to assist with Disease Diagnosis.

Floriculture Information - Developed by North Carolina State University, this site has information on many floricultural topics. Individual crops can be searched.

The Virtual Plant & Pest Diagnostic Laboratory - Developed by Purdue University, it covers the Disease and Insect Clinic that is available for pest diagnosis.