Many donors have contributed materials and funds to the OPGC.  Their contributions are gratefully acknowledged.

Marilyn Barlow Paul Cover Ron Kinser
Tony Pinto Natalie  Stoughton  Bob  Terwillegar 
Mike Valentine

Steve  Banovetz
Agrecol Corporation

Bill Claybaugh,
American Begonia Society
Mary Lou Gripshover
Joseph Hamm
Gerard Knehans, Jr
American Daffodil Society
Arnold Arboretum Baker's Acres Greenhouses
Peggy Campbell
Botanical Interests
Brian Corr
Ball Horticultural
James Ault
Chicago Botanic Garden
Jim Bissell
Cleveland Museum of Natural History

Niles Riese
Erns Benary Co.

Scott Peak
Hamilton County Park District

Derick Pittman
International Impatiens Society

Greg Houseal
Native Roadside Vegetative Center
Alice Traut
Native Seeds/SEARCH
Netherland Bulb Company Northa Ameican China Plant Exploration Consortium Jeff Norcini
North Florida Research and Education Center
Ohio Department of Natural Resources Ohio Prairie Association Michael Swintosky
Russell Eckley Fred Higginbotham III The Ohio State University Herbarium
Shawn Krosnick Richard Craig
Penn State University
Tony Avent
Plant Delights Nursery
Frank Porter
Porterbrook Native Plants
Justin Marotta
Possum Run Greenhouses
Rick & Beth Johnston
Seedsower Farm
Charles Heidgen
Shady Hill Gardens
St. Andrews Botanic Garden Don Beam
Stucker Meadows
Jim Adams
The Herb Society of America
Brian Parsons
The Holden Arboretum
Gary Hayes
The Nature Conservancy - Kitty Todd Nature Preserve
Bob Hawes
The Wilderness Center
Nicole Cavender
The Wilds
Michelle Grigore
Toledo Botanical Garden
Terry Zinn
Wester Native Seed Wildflowers of Florida
Brigid E. Bohl Mary Ritter Garden Club
The Garden Club of Clifton Jim Harper Dosatron
Express Seed Green Care Harold L. Lyon Arboretum
Raymond Baker Clifford Morden Scotts Company
Ron Determann
Atlanta Botanical Garden
Jim Rogers
Nearly Native Nursery