Wildflowers Blooming in Pennsylvania in October (60 Species)

60 wildflowers were recorded blooming in Pennsylvania in October in our iNaturalist sample; 6 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

White Snakeroot314 obs.

American Witch-Hazel189 obs.

Bluestem Goldenrod119 obs.

Common Blue Wood Aster84 obs.

Chicory71 obs.

Common Toadflax69 obs.

Low Smartweed63 obs.

New England aster58 obs.

Red Clover48 obs.

black-eyed Susan48 obs.

Fall Phlox47 obs.

Great Blue Lobelia45 obs.

All wildflowers blooming in Pennsylvania in October

#	Species	Scientific name	Family	Obs.	Peak in state
1	White Snakeroot	Ageratina altissima	Sunflowers, Daisies, Asters, and Allies	314	Sep (past peak)
2	American Witch-Hazel	Hamamelis virginiana	witch-hazel family	189	Oct (peak)
3	Bluestem Goldenrod	Solidago caesia	Sunflowers, Daisies, Asters, and Allies	119	Sep (past peak)
4	Common Blue Wood Aster	Symphyotrichum cordifolium	Sunflowers, Daisies, Asters, and Allies	84	Oct (peak)
5	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	71	Jul (past peak)
6	Common Toadflax	Linaria vulgaris	Plantain Family	69	Jul (past peak)
7	Low Smartweed	Persicaria longiseta	knotweed family	63	Oct (peak)
8	New England aster	Symphyotrichum novae-angliae	Sunflowers, Daisies, Asters, and Allies	58	Sep (past peak)
9	Red Clover	Trifolium pratense	Legumes	48	Jun (past peak)
10	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	48	Jul (past peak)
11	Fall Phlox	Phlox paniculata	phlox family	47	Sep (past peak)
12	Great Blue Lobelia	Lobelia siphilitica	bellflower family	45	Sep (past peak)
13	Wild Carrot	Daucus carota	carrot family	41	Jul (past peak)
14	Late Boneset	Eupatorium serotinum	Sunflowers, Daisies, Asters, and Allies	40	Sep (past peak)
15	Calico Aster	Symphyotrichum lateriflorum	Sunflowers, Daisies, Asters, and Allies	40	Sep (past peak)
16	Asiatic dayflower	Commelina communis	Spiderworts	39	Aug (past peak)
17	Frost Aster	Symphyotrichum pilosum	Sunflowers, Daisies, Asters, and Allies	36	Oct (peak)
18	White Clover	Trifolium repens	Legumes	35	May (past peak)
19	Tall Goldenrod	Solidago altissima	Sunflowers, Daisies, Asters, and Allies	35	Sep (past peak)
20	White Wood Aster	Eurybia divaricata	Sunflowers, Daisies, Asters, and Allies	30	Sep (past peak)
21	brown-eyed Susan	Rudbeckia triloba	Sunflowers, Daisies, Asters, and Allies	30	Sep (past peak)
22	Broad-Leaved Goldenrod	Solidago flexicaulis	Sunflowers, Daisies, Asters, and Allies	29	Sep (past peak)
23	Purple Crownvetch	Securigera varia	Legumes	28	Jun (past peak)
24	Common Jewelweed	Impatiens capensis	balsam family	27	Sep (past peak)
25	Shaggy Soldier	Galinsoga quadriradiata	Sunflowers, Daisies, Asters, and Allies	27	Oct (peak)
26	Common Selfheal	Prunella vulgaris	Mint Family	25	Jul (past peak)
27	Common Wrinkle-Leaved Goldenrod	Solidago rugosa	Sunflowers, Daisies, Asters, and Allies	24	Sep (past peak)
28	Wingstem	Verbesina alternifolia	Sunflowers, Daisies, Asters, and Allies	23	Sep (past peak)
29	White Campion	Silene latifolia	pink family	22	May (past peak)
30	Common Morning-Glory	Ipomoea purpurea	bindweed family	19	Oct (peak)
31	Indian tobacco	Lobelia inflata	bellflower family	19	Jul (past peak)
32	Wild Basil	Clinopodium vulgare	Mint Family	19	Jul (past peak)
33	Japanese honeysuckle	Lonicera japonica	honeysuckle family	18	Jun (past peak)
34	Blue Mistflower	Conoclinium coelestinum	Sunflowers, Daisies, Asters, and Allies	18	Sep (past peak)
35	Spotted Knapweed	Centaurea stoebe	Sunflowers, Daisies, Asters, and Allies	17	Jul (past peak)
36	Common Evening-Primrose	Oenothera biennis	evening primrose family	16	Sep (past peak)
37	Oxeye Daisy	Leucanthemum vulgare	Sunflowers, Daisies, Asters, and Allies	15	Jun (past peak)
38	Mock Strawberry	Potentilla indica	rose family	15	Apr (past peak)
39	Creeping Thistle	Cirsium arvense	Sunflowers, Daisies, Asters, and Allies	14	Jun (past peak)
40	American pokeweed	Phytolacca americana	Pokeweed Family	13	Jul (past peak)
41	Butterfly bush	Buddleja davidii	figwort family	13	Aug (past peak)
42	Pale Jewelweed	Impatiens pallida	balsam family	12	Sep (past peak)
43	Pearly Everlasting	Anaphalis margaritacea	Sunflowers, Daisies, Asters, and Allies	12	Aug (past peak)
44	Common Soapwort	Saponaria officinalis	pink family	12	Jul (past peak)
45	Swamp Aster	Symphyotrichum puniceum	Sunflowers, Daisies, Asters, and Allies	12	Sep (past peak)
46	Cutleaf Coneflower	Rudbeckia laciniata	Sunflowers, Daisies, Asters, and Allies	12	Aug (past peak)
47	Eastern Black Nightshade	Solanum emulans	nightshade family	12	Sep (past peak)
48	Common Yarrow	Achillea millefolium	Sunflowers, Daisies, Asters, and Allies	11	Jun (past peak)
49	Deptford pink	Dianthus armeria	pink family	11	Jun (past peak)
50	Black Medick	Medicago lupulina	Legumes	10	May (past peak)