58 wildflowers were recorded blooming in Rhode Island in October in our iNaturalist sample; 10 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in October

Northern Seaside Goldenrod

White Snakeroot

American Witch-Hazel
Groundsel Tree

Rugosa Rose

Common Toadflax

White Wood Aster

Common Dandelion
Japanese honeysuckle

Low Smartweed

Sweet Everlasting

Common Jewelweed
All wildflowers blooming in Rhode Island in October
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Northern Seaside Goldenrod | Solidago sempervirens | Sunflowers, Daisies, Asters, and Allies | 20 | Oct (peak) |
| 2 | White Snakeroot | Ageratina altissima | Sunflowers, Daisies, Asters, and Allies | 14 | Sep (past peak) |
| 3 | American Witch-Hazel | Hamamelis virginiana | witch-hazel family | 11 | Oct (peak) |
| 4 | Groundsel Tree | Baccharis halimifolia | Sunflowers, Daisies, Asters, and Allies | 11 | Sep (past peak) |
| 5 | Rugosa Rose | Rosa rugosa | rose family | 7 | Jul (past peak) |
| 6 | Common Toadflax | Linaria vulgaris | Plantain Family | 6 | Aug (past peak) |
| 7 | White Wood Aster | Eurybia divaricata | Sunflowers, Daisies, Asters, and Allies | 6 | Oct (peak) |
| 8 | Common Dandelion | Taraxacum officinale | Sunflowers, Daisies, Asters, and Allies | 5 | Jun (past peak) |
| 9 | Japanese honeysuckle | Lonicera japonica | honeysuckle family | 5 | Jul (past peak) |
| 10 | Low Smartweed | Persicaria longiseta | knotweed family | 5 | Oct (peak) |
| 11 | Sweet Everlasting | Pseudognaphalium obtusifolium | Sunflowers, Daisies, Asters, and Allies | 5 | Sep (past peak) |
| 12 | Common Jewelweed | Impatiens capensis | balsam family | 4 | Aug (past peak) |
| 13 | Chicory | Cichorium intybus | Sunflowers, Daisies, Asters, and Allies | 4 | Jul (past peak) |
| 14 | Flat-Topped Goldenrod | Euthamia graminifolia | Sunflowers, Daisies, Asters, and Allies | 4 | Sep (past peak) |
| 15 | Asiatic dayflower | Commelina communis | Spiderworts | 3 | Sep (past peak) |
| 16 | Wild radish | Raphanus raphanistrum | mustard family | 3 | Oct (peak) |
| 17 | American groundnut | Apios americana | Legumes | 3 | Jul (past peak) |
| 18 | Bluestem Goldenrod | Solidago caesia | Sunflowers, Daisies, Asters, and Allies | 3 | Oct (peak) |
| 19 | Red Clover | Trifolium pratense | Legumes | 2 | Jun (past peak) |
| 20 | Common Yarrow | Achillea millefolium | Sunflowers, Daisies, Asters, and Allies | 2 | Jun (past peak) |
| 21 | Sheep Laurel | Kalmia angustifolia | heath family | 2 | Jun (past peak) |
| 22 | Common Soapwort | Saponaria officinalis | pink family | 2 | Jul (past peak) |
| 23 | Purple Loosestrife | Lythrum salicaria | lythrum family | 2 | Aug (past peak) |
| 24 | black-eyed Susan | Rudbeckia hirta | Sunflowers, Daisies, Asters, and Allies | 2 | Jul (past peak) |
| 25 | Spotted Knapweed | Centaurea stoebe | Sunflowers, Daisies, Asters, and Allies | 2 | Jul (past peak) |
| 26 | Tall Goldenrod | Solidago altissima | Sunflowers, Daisies, Asters, and Allies | 2 | Sep (past peak) |
| 27 | Great Blue Lobelia | Lobelia siphilitica | bellflower family | 2 | Aug (past peak) |
| 28 | Silverrod | Solidago bicolor | Sunflowers, Daisies, Asters, and Allies | 2 | Sep (past peak) |
| 29 | Scarlet Pimpernel | Lysimachia arvensis | primrose family | 2 | Jun (past peak) |
| 30 | American pokeweed | Phytolacca americana | Pokeweed Family | 1 | Jul (past peak) |
| 31 | Prickly Cucumber | Echinocystis lobata | gourd family | 1 | Oct (peak) |
| 32 | American white waterlily | Nymphaea odorata | Waterlily Family | 1 | Jul (past peak) |
| 33 | Firewheel | Gaillardia pulchella | Sunflowers, Daisies, Asters, and Allies | 1 | Aug (past peak) |
| 34 | Tufted Vetch | Vicia cracca | Legumes | 1 | Jun (past peak) |
| 35 | Common Cat's-ear | Hypochaeris radicata | Sunflowers, Daisies, Asters, and Allies | 1 | Oct (peak) |
| 36 | Common Tansy | Tanacetum vulgare | Sunflowers, Daisies, Asters, and Allies | 1 | Aug (past peak) |
| 37 | Shaggy Soldier | Galinsoga quadriradiata | Sunflowers, Daisies, Asters, and Allies | 1 | Sep (past peak) |
| 38 | White Sweetclover | Melilotus albus | Legumes | 1 | Aug (past peak) |
| 39 | Marsh Fleabane | Pluchea odorata | Sunflowers, Daisies, Asters, and Allies | 1 | Aug (past peak) |
| 40 | Broad-Leaved Sweet Pea | Lathyrus latifolius | Legumes | 1 | Jun (past peak) |
| 41 | Common Evening-Primrose | Oenothera biennis | evening primrose family | 1 | Aug (past peak) |
| 42 | Indian tobacco | Lobelia inflata | bellflower family | 1 | Jul (past peak) |
| 43 | American germander | Teucrium canadense | Mint Family | 1 | Oct (peak) |
| 44 | Hoary Alyssum | Berteroa incana | mustard family | 1 | Oct (peak) |
| 45 | Nodding Beggarticks | Bidens cernua | Sunflowers, Daisies, Asters, and Allies | 1 | Sep (past peak) |
| 46 | Plains Coreopsis | Coreopsis tinctoria | Sunflowers, Daisies, Asters, and Allies | 1 | Jul (past peak) |
| 47 | Shrubby Cinquefoil | Dasiphora fruticosa | rose family | 1 | Jun (past peak) |
| 48 | Wild Carrot | Daucus carota | carrot family | 1 | Aug (past peak) |
| 49 | Swamp Aster | Symphyotrichum puniceum | Sunflowers, Daisies, Asters, and Allies | 1 | Sep (past peak) |
| 50 | New England aster | Symphyotrichum novae-angliae | Sunflowers, Daisies, Asters, and Allies | 1 | Sep (past peak) |