60 wildflowers were recorded blooming in Vermont in May in our iNaturalist sample; 39 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in May

Red Trillium

Jack-in-the-Pulpit
Painted Trillium

Large White Trillium

Yellow Trout Lily
Creeping Foamflower

Marsh Marigold
Carolina Springbeauty

Northern Starflower

Azure Bluet

Red Columbine
Wood Anemone
All wildflowers blooming in Vermont in May
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Red Trillium | Trillium erectum | Herb-Paris, False Hellebores, Trilliums and allies | 2,056 | May (peak) |
| 2 | Jack-in-the-Pulpit | Arisaema triphyllum | Arum Family | 1,230 | May (peak) |
| 3 | Painted Trillium | Trillium undulatum | Herb-Paris, False Hellebores, Trilliums and allies | 1,089 | May (peak) |
| 4 | Large White Trillium | Trillium grandiflorum | Herb-Paris, False Hellebores, Trilliums and allies | 1,008 | May (peak) |
| 5 | Yellow Trout Lily | Erythronium americanum | lily family | 952 | May (peak) |
| 6 | Creeping Foamflower | Tiarella stolonifera | saxifrage family | 870 | May (peak) |
| 7 | Marsh Marigold | Caltha palustris | buttercup family | 713 | May (peak) |
| 8 | Carolina Springbeauty | Claytonia caroliniana | Pussypaw Family | 701 | Apr (past peak) |
| 9 | Northern Starflower | Lysimachia borealis | primrose family | 694 | May (peak) |
| 10 | Azure Bluet | Houstonia caerulea | madder family | 684 | May (peak) |
| 11 | Red Columbine | Aquilegia canadensis | buttercup family | 572 | May (peak) |
| 12 | Wood Anemone | Anemonoides quinquefolia | buttercup family | 571 | May (peak) |
| 13 | Sessile Bellwort | Uvularia sessilifolia | Bellworts and allies | 552 | May (peak) |
| 14 | Dutchman's breeches | Dicentra cucullaria | Poppy Family | 487 | Apr (past peak) |
| 15 | Fringed Polygala | Polygaloides paucifolia | milkworts | 469 | May (peak) |
| 16 | Twoleaf Miterwort | Mitella diphylla | saxifrage family | 459 | May (peak) |
| 17 | Bloodroot | Sanguinaria canadensis | Poppy Family | 443 | Apr (past peak) |
| 18 | Two-leaved Toothwort | Cardamine diphylla | mustard family | 389 | May (peak) |
| 19 | Hobblebush | Viburnum lantanoides | elder family | 363 | May (peak) |
| 20 | Largeflower Bellwort | Uvularia grandiflora | Bellworts and allies | 331 | May (peak) |
| 21 | Garlic Mustard | Alliaria petiolata | mustard family | 320 | May (peak) |
| 22 | golden Alexanders | Zizia aurea | carrot family | 308 | May (peak) |
| 23 | Pink Lady's Slipper | Cypripedium acaule | Orchids | 299 | Jun (rising) |
| 24 | Bluebead Lily | Clintonia borealis | lily family | 293 | Jun (rising) |
| 25 | Canada mayflower | Maianthemum canadense | agave and allies | 290 | May (peak) |
| 26 | Red-Berried Elder | Sambucus racemosa | elder family | 286 | May (peak) |
| 27 | Squirrel Corn | Dicentra canadensis | Poppy Family | 285 | May (peak) |
| 28 | Canada Violet | Viola canadensis | Violet Family | 273 | May (peak) |
| 29 | Threeleaf Goldthread | Coptis trifolia | buttercup family | 266 | May (peak) |
| 30 | Virginia saxifrage | Micranthes virginiensis | saxifrage family | 265 | May (peak) |
| 31 | Virginia strawberry | Fragaria virginiana | rose family | 263 | May (peak) |
| 32 | Colt's-Foot | Tussilago farfara | Sunflowers, Daisies, Asters, and Allies | 241 | Apr (past peak) |
| 33 | Dwarf Ginseng | Panax trifolius | ivy family | 238 | May (peak) |
| 34 | Red Baneberry | Actaea rubra | buttercup family | 233 | May (peak) |
| 35 | American fly-honeysuckle | Lonicera canadensis | honeysuckle family | 201 | May (peak) |
| 36 | Small-Flowered Buttercup | Ranunculus abortivus | buttercup family | 198 | May (peak) |
| 37 | Smooth Yellow Violet | Viola eriocarpa | Violet Family | 198 | May (peak) |
| 38 | Greater celandine | Chelidonium majus | Poppy Family | 190 | May (peak) |
| 39 | Chokecherry | Prunus virginiana | rose family | 178 | May (peak) |
| 40 | Long-spurred violet | Viola rostrata | Violet Family | 175 | May (peak) |
| 41 | Early Blue Cohosh | Caulophyllum giganteum | barberry family | 171 | Apr (past peak) |
| 42 | Ground-Ivy | Glechoma hederacea | Mint Family | 162 | May (peak) |
| 43 | Solomon's plume | Maianthemum racemosum | agave and allies | 158 | Jun (rising) |
| 44 | Bitter Wintercress | Barbarea vulgaris | mustard family | 150 | May (peak) |
| 45 | Yellow Lady's Slipper | Cypripedium parviflorum | Orchids | 145 | May (peak) |
| 46 | Sharp-Lobed Hepatica | Hepatica acutiloba | buttercup family | 143 | Apr (past peak) |
| 47 | Round-leaved Violet | Viola rotundifolia | Violet Family | 142 | Apr (past peak) |
| 48 | Dame's Rocket | Hesperis matronalis | mustard family | 139 | Jun (rising) |
| 49 | Lesser Periwinkle | Vinca minor | Dogbane Family | 139 | May (peak) |
| 50 | White Baneberry | Actaea pachypoda | buttercup family | 137 | May (peak) |