Please look for and ask for straight species native plants, not cultivars or hybrids. Read about the difference here.
Regional native plant sources
(The Ohio Native Plant Month website has links to lists of native plants)
Leaves for Wildlife, Sunbury OH
Meadow City Nursery, Cleveland OH
Native Roots, Inc., Richfield OH
Natives in Harmony, Marengo OH
Plant it Native, Willoughby OH
Powell’s Native Wildflowers, North Canton OH
Mail order sources
Ohio Prairie Nursery, Hiram OH (seeds only)
Prairie Moon Nursery, Winona MN
Prairie Nursery, Westfield WI
Native tree nurseries
A guide to Ohio native trees:
http://wildlife.ohiodnr.gov/portals/wildlife/pdfs/publications/ID guides/Pub 5509 Trees of Ohio.pdf
Many local and national chains (Gale’s, Pettitis, Bremecs, Lowe’s, Home Depot etc.) sell native trees.
Read the label to see if they are straight species, and ask where they were grown in order to match their source to your ecoregion for best results.