Wildflowers Blooming in Illinois in October (60 Species)

60 wildflowers were recorded blooming in Illinois in October in our iNaturalist sample; 5 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Feb Mar Apr May Jun Jul Aug Sep Oct Nov

Top wildflowers in October

New England aster78 obs.

White Snakeroot58 obs.

Asiatic dayflower43 obs.

Chicory30 obs.

Fall Phlox29 obs.

Common Morning-Glory28 obs.

Great Blue Lobelia26 obs.

Partridge Pea22 obs.

Bluestem Goldenrod21 obs.

Tall Bellflower21 obs.

Red Clover20 obs.

Tall Goldenrod20 obs.

All wildflowers blooming in Illinois in October

#	Species	Scientific name	Family	Obs.	Peak in state
1	New England aster	Symphyotrichum novae-angliae	Sunflowers, Daisies, Asters, and Allies	78	Sep (past peak)
2	White Snakeroot	Ageratina altissima	Sunflowers, Daisies, Asters, and Allies	58	Sep (past peak)
3	Asiatic dayflower	Commelina communis	Spiderworts	43	Jul (past peak)
4	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	30	Jul (past peak)
5	Fall Phlox	Phlox paniculata	phlox family	29	Aug (past peak)
6	Common Morning-Glory	Ipomoea purpurea	bindweed family	28	Sep (past peak)
7	Great Blue Lobelia	Lobelia siphilitica	bellflower family	26	Sep (past peak)
8	Partridge Pea	Chamaecrista fasciculata	Legumes	22	Aug (past peak)
9	Bluestem Goldenrod	Solidago caesia	Sunflowers, Daisies, Asters, and Allies	21	Oct (peak)
10	Tall Bellflower	Campanulastrum americanum	bellflower family	21	Jul (past peak)
11	Red Clover	Trifolium pratense	Legumes	20	Jun (past peak)
12	Tall Goldenrod	Solidago altissima	Sunflowers, Daisies, Asters, and Allies	20	Sep (past peak)
13	brown-eyed Susan	Rudbeckia triloba	Sunflowers, Daisies, Asters, and Allies	20	Aug (past peak)
14	Flower-Of-An-Hour	Hibiscus trionum	Mallow and Hibiscus Family	16	Sep (past peak)
15	Low Smartweed	Persicaria longiseta	knotweed family	16	Oct (peak)
16	Common Jewelweed	Impatiens capensis	balsam family	14	Sep (past peak)
17	Obedient Plant	Physostegia virginiana	Mint Family	14	Aug (past peak)
18	Blue Mistflower	Conoclinium coelestinum	Sunflowers, Daisies, Asters, and Allies	14	Sep (past peak)
19	American Witch-Hazel	Hamamelis virginiana	witch-hazel family	13	Oct (peak)
20	Common Sneezeweed	Helenium autumnale	Sunflowers, Daisies, Asters, and Allies	13	Sep (past peak)
21	Wild Carrot	Daucus carota	carrot family	12	Jul (past peak)
22	American pokeweed	Phytolacca americana	Pokeweed Family	11	Jul (past peak)
23	Common Toadflax	Linaria vulgaris	Plantain Family	11	Jul (past peak)
24	fen grass of Parnassus	Parnassia glauca	staff-vine family	11	Sep (past peak)
25	Frost Aster	Symphyotrichum pilosum	Sunflowers, Daisies, Asters, and Allies	11	Sep (past peak)
26	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	10	Jun (past peak)
27	Grey-Headed Coneflower	Ratibida pinnata	Sunflowers, Daisies, Asters, and Allies	10	Jul (past peak)
28	Calico Aster	Symphyotrichum lateriflorum	Sunflowers, Daisies, Asters, and Allies	9	Sep (past peak)
29	Late Boneset	Eupatorium serotinum	Sunflowers, Daisies, Asters, and Allies	8	Sep (past peak)
30	Common Soapwort	Saponaria officinalis	pink family	8	Jul (past peak)
31	Broad-Leaved Goldenrod	Solidago flexicaulis	Sunflowers, Daisies, Asters, and Allies	8	Sep (past peak)
32	Purple Crownvetch	Securigera varia	Legumes	8	Jun (past peak)
33	White Morning-glory	Ipomoea lacunosa	bindweed family	8	Sep (past peak)
34	Eastern Black Nightshade	Solanum emulans	nightshade family	8	Sep (past peak)
35	Purple Coneflower	Echinacea purpurea	Sunflowers, Daisies, Asters, and Allies	7	Jul (past peak)
36	White Clover	Trifolium repens	Legumes	7	Jun (past peak)
37	Shaggy Soldier	Galinsoga quadriradiata	Sunflowers, Daisies, Asters, and Allies	7	Sep (past peak)
38	Wingstem	Verbesina alternifolia	Sunflowers, Daisies, Asters, and Allies	7	Aug (past peak)
39	Large-Leaved Aster	Eurybia macrophylla	Sunflowers, Daisies, Asters, and Allies	7	Sep (past peak)
40	Common Blue Wood Aster	Symphyotrichum cordifolium	Sunflowers, Daisies, Asters, and Allies	7	Oct (peak)
41	Common Selfheal	Prunella vulgaris	Mint Family	6	Jul (past peak)
42	Plains Coreopsis	Coreopsis tinctoria	Sunflowers, Daisies, Asters, and Allies	6	Oct (peak)
43	Field Bindweed	Convolvulus arvensis	bindweed family	5	Jun (past peak)
44	Bittersweet Nightshade	Solanum dulcamara	nightshade family	5	Jun (past peak)
45	Marsh Marigold	Caltha palustris	buttercup family	5	Apr (past peak)
46	Ohio spiderwort	Tradescantia ohiensis	Spiderworts	5	Jun (past peak)
47	False Sunflower	Heliopsis helianthoides	Sunflowers, Daisies, Asters, and Allies	5	Jul (past peak)
48	Mock Strawberry	Potentilla indica	rose family	5	May (past peak)
49	Common Dandelion	Taraxacum officinale	Sunflowers, Daisies, Asters, and Allies	4	Apr (past peak)
50	Hedge Bindweed	Calystegia sepium	bindweed family	4	Jul (past peak)