Native plants:
Indigo bush
Gray-headed coneflower
Purple coneflower
Pale purple coneflower
Purple prairie clover
Orange Milkweed
Eastern prickly pear
Prairie blazing star
Riddell's goldenrod*
Stiff leaved goldenrod*
Upland white aster
Smooth blue aster
New England Aster
Blanket flower
Lance-leaved coreopsis
Showy tick trefoil
Black eyed susan
Wild bergamot
* Though goldenrod was long blamed for causing hay fever, it has now been proven that the real culprit is ragweed!
Ornamental plants
Showy Sedum
Marigolds
Phlox
Zinnia
Cosmos
Lavender
Thyme
Chives
Butterfly bush
And for hummingbirds:
trumpet vine and eastern columbine