60 wildflowers were recorded blooming in New York in April in our iNaturalist sample; 35 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in April

Lesser Celandine

Bloodroot

Yellow Trout Lily

Red Deadnettle

Red Trillium

Dutchman's breeches
Garlic Mustard
Virginia Springbeauty

Large White Trillium

Colt's-Foot

Marsh Marigold

Lesser Periwinkle
All wildflowers blooming in New York in April
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Lesser Celandine | Ficaria verna | buttercup family | 2,151 | Apr (peak) |
| 2 | Bloodroot | Sanguinaria canadensis | Poppy Family | 1,366 | Apr (peak) |
| 3 | Yellow Trout Lily | Erythronium americanum | lily family | 1,215 | Apr (peak) |
| 4 | Red Deadnettle | Lamium purpureum | Mint Family | 850 | Apr (peak) |
| 5 | Red Trillium | Trillium erectum | Herb-Paris, False Hellebores, Trilliums and allies | 816 | Apr (peak) |
| 6 | Dutchman's breeches | Dicentra cucullaria | Poppy Family | 714 | Apr (peak) |
| 7 | Garlic Mustard | Alliaria petiolata | mustard family | 669 | Apr (peak) |
| 8 | Virginia Springbeauty | Claytonia virginica | Pussypaw Family | 562 | Apr (peak) |
| 9 | Large White Trillium | Trillium grandiflorum | Herb-Paris, False Hellebores, Trilliums and allies | 533 | May (rising) |
| 10 | Colt's-Foot | Tussilago farfara | Sunflowers, Daisies, Asters, and Allies | 440 | Apr (peak) |
| 11 | Marsh Marigold | Caltha palustris | buttercup family | 435 | Apr (peak) |
| 12 | Lesser Periwinkle | Vinca minor | Dogbane Family | 421 | Apr (peak) |
| 13 | Northern Spicebush | Lindera benzoin | laurels | 379 | Apr (peak) |
| 14 | Trailing Arbutus | Epigaea repens | heath family | 345 | Apr (peak) |
| 15 | Carolina Springbeauty | Claytonia caroliniana | Pussypaw Family | 322 | Apr (peak) |
| 16 | Virginia bluebells | Mertensia virginica | borage family | 290 | Apr (peak) |
| 17 | Ground-Ivy | Glechoma hederacea | Mint Family | 289 | May (rising) |
| 18 | Siberian squill | Scilla siberica | agave and allies | 264 | Apr (peak) |
| 19 | Common Dandelion | Taraxacum officinale | Sunflowers, Daisies, Asters, and Allies | 252 | Apr (peak) |
| 20 | Rue Anemone | Thalictrum thalictroides | buttercup family | 237 | Apr (peak) |
| 21 | Jetbead | Rhodotypos scandens | rose family | 224 | Apr (peak) |
| 22 | Early Blue Cohosh | Caulophyllum giganteum | barberry family | 219 | Apr (peak) |
| 23 | Red Maple | Acer rubrum | soapberry family | 203 | Apr (peak) |
| 24 | Norway maple | Acer platanoides | soapberry family | 188 | Apr (peak) |
| 25 | Lawn daisy | Bellis perennis | Sunflowers, Daisies, Asters, and Allies | 188 | May (rising) |
| 26 | Cut-Leaved Toothwort | Cardamine concatenata | mustard family | 181 | Apr (peak) |
| 27 | Red Columbine | Aquilegia canadensis | buttercup family | 171 | May (rising) |
| 28 | Wild Geranium | Geranium maculatum | Geranium family | 166 | May (rising) |
| 29 | Bird's-Eye Speedwell | Veronica persica | Plantain Family | 165 | Apr (peak) |
| 30 | Eastern Skunk Cabbage | Symplocarpus foetidus | Arum Family | 162 | Mar (past peak) |
| 31 | Wood Anemone | Anemonoides quinquefolia | buttercup family | 161 | Apr (peak) |
| 32 | Eastern Redbud | Cercis canadensis | Legumes | 156 | Apr (peak) |
| 33 | Mock Strawberry | Potentilla indica | rose family | 155 | May (rising) |
| 34 | Henbit Deadnettle | Lamium amplexicaule | Mint Family | 144 | Apr (peak) |
| 35 | Moss Phlox | Phlox subulata | phlox family | 141 | May (rising) |
| 36 | Hairy Bittercress | Cardamine hirsuta | mustard family | 140 | Apr (peak) |
| 37 | Squirrel Corn | Dicentra canadensis | Poppy Family | 139 | May (rising) |
| 38 | Sharp-Lobed Hepatica | Hepatica acutiloba | buttercup family | 138 | Apr (peak) |
| 39 | Virginia saxifrage | Micranthes virginiensis | saxifrage family | 138 | Apr (peak) |
| 40 | Azure Bluet | Houstonia caerulea | madder family | 136 | May (rising) |
| 41 | Round-Lobed Hepatica | Hepatica americana | buttercup family | 136 | Apr (peak) |
| 42 | Beach Plum | Prunus maritima | rose family | 127 | May (rising) |
| 43 | Annual Honesty | Lunaria annua | mustard family | 118 | May (rising) |
| 44 | Shepherd's-Purse | Capsella bursa-pastoris | mustard family | 118 | Apr (peak) |
| 45 | Greater celandine | Chelidonium majus | Poppy Family | 112 | May (rising) |
| 46 | Common Snowdrop | Galanthus nivalis | amaryllis, onions, and allies | 94 | Mar (past peak) |
| 47 | Common Whitlowgrass | Draba verna | mustard family | 94 | Apr (peak) |
| 48 | Celandine Poppy | Chelidonium diphyllum | Poppy Family | 92 | Apr (peak) |
| 49 | Box Elder | Acer negundo | soapberry family | 91 | Apr (peak) |
| 50 | Catchweed Bedstraw | Galium aparine | madder family | 91 | May (rising) |