60 wildflowers were recorded blooming in Ohio in June in our iNaturalist sample; 31 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in June

Climbing Prairie Rose

American black elderberry

black-eyed Susan
Foxglove Beardtongue

Creeping Thistle

Bird's-Foot Trefoil

Partridgeberry

Border Privet

Multiflora Rose

Common Milkweed
Carolina rose

Purple Crownvetch
All wildflowers blooming in Ohio in June
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Climbing Prairie Rose | Rosa setigera | rose family | 684 | Jun (peak) |
| 2 | American black elderberry | Sambucus canadensis | elder family | 440 | Jun (peak) |
| 3 | black-eyed Susan | Rudbeckia hirta | Sunflowers, Daisies, Asters, and Allies | 431 | Jul (rising) |
| 4 | Foxglove Beardtongue | Penstemon digitalis | Plantain Family | 263 | Jun (peak) |
| 5 | Creeping Thistle | Cirsium arvense | Sunflowers, Daisies, Asters, and Allies | 225 | Jun (peak) |
| 6 | Bird's-Foot Trefoil | Lotus corniculatus | Legumes | 215 | Jun (peak) |
| 7 | Partridgeberry | Mitchella repens | madder family | 211 | Jun (peak) |
| 8 | Border Privet | Ligustrum obtusifolium | olive family | 168 | Jun (peak) |
| 9 | Multiflora Rose | Rosa multiflora | rose family | 160 | May (past peak) |
| 10 | Common Milkweed | Asclepias syriaca | Dogbane Family | 148 | Jun (peak) |
| 11 | Carolina rose | Rosa carolina | rose family | 143 | Jun (peak) |
| 12 | Purple Crownvetch | Securigera varia | Legumes | 134 | Jun (peak) |
| 13 | Deptford pink | Dianthus armeria | pink family | 129 | Jun (peak) |
| 14 | Swamp Rose | Rosa palustris | rose family | 126 | Jul (rising) |
| 15 | Butterfly Milkweed | Asclepias tuberosa | Dogbane Family | 122 | Jul (rising) |
| 16 | Yellow Sweetclover | Melilotus officinalis | Legumes | 121 | Jun (peak) |
| 17 | Fire Pink | Silene virginica | pink family | 113 | May (past peak) |
| 18 | Sulphur Cinquefoil | Potentilla recta | rose family | 105 | Jun (peak) |
| 19 | Dame's Rocket | Hesperis matronalis | mustard family | 103 | May (past peak) |
| 20 | Poison Hemlock | Conium maculatum | carrot family | 101 | Jun (peak) |
| 21 | Common Jewelweed | Impatiens capensis | balsam family | 99 | Sep (rising) |
| 22 | creeping Jenny | Lysimachia nummularia | primrose family | 96 | Jun (peak) |
| 23 | Tuberous Grasspink | Calopogon tuberosus | Orchids | 96 | Jun (peak) |
| 24 | clasping Venus's looking glass | Triodanis perfoliata | bellflower family | 95 | Jun (peak) |
| 25 | Red Clover | Trifolium pratense | Legumes | 92 | Sep (rising) |
| 26 | Showy Lady's Slipper | Cypripedium reginae | Orchids | 91 | Jun (peak) |
| 27 | Tall Blue Wild Indigo | Baptisia australis | Legumes | 87 | May (past peak) |
| 28 | Common Yarrow | Achillea millefolium | Sunflowers, Daisies, Asters, and Allies | 85 | Jun (peak) |
| 29 | White Clover | Trifolium repens | Legumes | 82 | Sep (rising) |
| 30 | Black Medick | Medicago lupulina | Legumes | 82 | Jun (peak) |
| 31 | Carolina horsenettle | Solanum carolinense | nightshade family | 81 | Jul (rising) |
| 32 | Moth Mullein | Verbascum blattaria | figwort family | 77 | Jun (peak) |
| 33 | Striped Wintergreen | Chimaphila maculata | heath family | 76 | Jun (peak) |
| 34 | Oxeye Daisy | Leucanthemum vulgare | Sunflowers, Daisies, Asters, and Allies | 73 | Jun (peak) |
| 35 | Hemp Dogbane | Apocynum cannabinum | Dogbane Family | 68 | Jun (peak) |
| 36 | Field Bindweed | Convolvulus arvensis | bindweed family | 66 | Jun (peak) |
| 37 | Common Selfheal | Prunella vulgaris | Mint Family | 65 | Jul (rising) |
| 38 | Bittersweet Nightshade | Solanum dulcamara | nightshade family | 64 | Jun (peak) |
| 39 | Fringed Loosestrife | Lysimachia ciliata | primrose family | 61 | Jul (rising) |
| 40 | Pickerelweed | Pontederia cordata | Pickerelweeds | 60 | Jul (rising) |
| 41 | Chicory | Cichorium intybus | Sunflowers, Daisies, Asters, and Allies | 58 | Sep (rising) |
| 42 | Michigan lily | Lilium michiganense | lily family | 57 | Jun (peak) |
| 43 | Wild Bergamot | Monarda fistulosa | Mint Family | 56 | Jul (rising) |
| 44 | Pale Jewelweed | Impatiens pallida | balsam family | 54 | Sep (rising) |
| 45 | Azure Bluet | Houstonia caerulea | madder family | 53 | Apr (past peak) |
| 46 | Hairy Vetch | Vicia villosa | Legumes | 52 | Jun (peak) |
| 47 | Smooth Sumac | Rhus glabra | Cashew Family | 51 | Jun (peak) |
| 48 | Common Hoptree | Ptelea trifoliata | citrus family | 50 | Jun (peak) |
| 49 | White Avens | Geum canadense | rose family | 48 | Jun (peak) |
| 50 | False Sunflower | Heliopsis helianthoides | Sunflowers, Daisies, Asters, and Allies | 48 | Jul (rising) |