60 wildflowers were recorded blooming in Alabama in September in our iNaturalist sample; 25 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in September

Blue Mistflower
Cardinal Flower

Purple Passionflower

Pineland Hibiscus

American hog-peanut

Late Boneset

Asiatic dayflower
Blue Curls

Common Jewelweed

Tall Goldenrod

Pine lily

Climbing Hempvine
All wildflowers blooming in Alabama in September
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Blue Mistflower | Conoclinium coelestinum | Sunflowers, Daisies, Asters, and Allies | 100 | Sep (peak) |
| 2 | Cardinal Flower | Lobelia cardinalis | bellflower family | 91 | Sep (peak) |
| 3 | Purple Passionflower | Passiflora incarnata | Passionfruit Family | 72 | Aug (past peak) |
| 4 | Pineland Hibiscus | Sabdariffa aculeata | Mallow and Hibiscus Family | 64 | Jun (past peak) |
| 5 | American hog-peanut | Amphicarpaea bracteata | Legumes | 58 | Sep (peak) |
| 6 | Late Boneset | Eupatorium serotinum | Sunflowers, Daisies, Asters, and Allies | 57 | Sep (peak) |
| 7 | Asiatic dayflower | Commelina communis | Spiderworts | 49 | Sep (peak) |
| 8 | Blue Curls | Trichostema dichotomum | Mint Family | 45 | Sep (peak) |
| 9 | Common Jewelweed | Impatiens capensis | balsam family | 43 | Sep (peak) |
| 10 | Tall Goldenrod | Solidago altissima | Sunflowers, Daisies, Asters, and Allies | 42 | Oct (rising) |
| 11 | Pine lily | Lilium catesbaei | lily family | 41 | Sep (peak) |
| 12 | Climbing Hempvine | Mikania scandens | Sunflowers, Daisies, Asters, and Allies | 38 | Sep (peak) |
| 13 | Frostweed | Verbesina virginica | Sunflowers, Daisies, Asters, and Allies | 38 | Sep (peak) |
| 14 | Butterfly Pea | Centrosema virginianum | Legumes | 36 | Aug (past peak) |
| 15 | White Morning-glory | Ipomoea lacunosa | bindweed family | 35 | Sep (peak) |
| 16 | Buttonweed | Diodia virginiana | madder family | 30 | Sep (peak) |
| 17 | Perennial Wooly Bean | Strophostyles umbellata | Legumes | 29 | Sep (peak) |
| 18 | Partridge Pea | Chamaecrista fasciculata | Legumes | 28 | Aug (past peak) |
| 19 | brown-eyed Susan | Rudbeckia triloba | Sunflowers, Daisies, Asters, and Allies | 28 | Jul (past peak) |
| 20 | Bitterweed | Helenium amarum | Sunflowers, Daisies, Asters, and Allies | 27 | Sep (peak) |
| 21 | Wild Potato Vine | Ipomoea pandurata | bindweed family | 27 | Jul (past peak) |
| 22 | Trailing Fuzzy-Bean | Strophostyles helvola | Legumes | 25 | Sep (peak) |
| 23 | White beggarticks | Bidens alba | Sunflowers, Daisies, Asters, and Allies | 24 | Oct (rising) |
| 24 | Tall Bellflower | Campanulastrum americanum | bellflower family | 22 | Jul (past peak) |
| 25 | Pickerelweed | Pontederia cordata | Pickerelweeds | 20 | Jun (past peak) |
| 26 | American trumpet vine | Campsis radicans | bignonia family | 19 | Jun (past peak) |
| 27 | False Daisy | Eclipta prostrata | Sunflowers, Daisies, Asters, and Allies | 19 | Sep (peak) |
| 28 | Camphorweed | Heterotheca subaxillaris | Sunflowers, Daisies, Asters, and Allies | 19 | Oct (rising) |
| 29 | Wingstem | Verbesina alternifolia | Sunflowers, Daisies, Asters, and Allies | 19 | Sep (peak) |
| 30 | Carolina horsenettle | Solanum carolinense | nightshade family | 18 | May (past peak) |
| 31 | Sweet Everlasting | Pseudognaphalium obtusifolium | Sunflowers, Daisies, Asters, and Allies | 18 | Sep (peak) |
| 32 | Spotted Horsemint | Monarda punctata | Mint Family | 15 | Sep (peak) |
| 33 | Tievine | Ipomoea cordatotriloba | bindweed family | 15 | Sep (peak) |
| 34 | Low Smartweed | Persicaria longiseta | knotweed family | 15 | Oct (rising) |
| 35 | American pokeweed | Phytolacca americana | Pokeweed Family | 14 | Jun (past peak) |
| 36 | Giant Ragweed | Ambrosia trifida | Sunflowers, Daisies, Asters, and Allies | 14 | Sep (peak) |
| 37 | Downy Lobelia | Lobelia puberula | bellflower family | 14 | Sep (peak) |
| 38 | American groundnut | Apios americana | Legumes | 14 | Aug (past peak) |
| 39 | Saltmarsh mallow | Kosteletzkya pentacarpos | Mallow and Hibiscus Family | 14 | Jul (past peak) |
| 40 | Leafy Elephant's-Foot | Elephantopus carolinianus | Sunflowers, Daisies, Asters, and Allies | 13 | Sep (peak) |
| 41 | Largeleaf Pennywort | Hydrocotyle bonariensis | ivy family | 13 | Jun (past peak) |
| 42 | Common Sneezeweed | Helenium autumnale | Sunflowers, Daisies, Asters, and Allies | 12 | Sep (peak) |
| 43 | Common Boneset | Eupatorium perfoliatum | Sunflowers, Daisies, Asters, and Allies | 12 | Sep (peak) |
| 44 | Ghost Pipe | Monotropa uniflora | heath family | 11 | Oct (rising) |
| 45 | Sharpwing Monkeyflower | Mimulus alatus | lopseed family | 11 | Aug (past peak) |
| 46 | Common Evening-Primrose | Oenothera biennis | evening primrose family | 10 | Oct (rising) |
| 47 | Whitemouth Dayflower | Commelina erecta | Spiderworts | 9 | Jun (past peak) |
| 48 | White Clover | Trifolium repens | Legumes | 9 | Apr (past peak) |
| 49 | Japanese honeysuckle | Lonicera japonica | honeysuckle family | 9 | Apr (past peak) |
| 50 | American black elderberry | Sambucus canadensis | elder family | 9 | Jun (past peak) |