Wildflowers Blooming in Maine in September (60 Species)

60 wildflowers were recorded blooming in Maine in September in our iNaturalist sample; 11 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Apr May Jun Jul Aug Sep Oct

Top wildflowers in September

Flat-Top White Aster337 obs.

Silverrod204 obs.

New England aster132 obs.

Whorled Wood Aster117 obs.

Northern Seaside Goldenrod111 obs.

Common Jewelweed110 obs.

Pearly Everlasting110 obs.

Common Wrinkle-Leaved Goldenrod86 obs.

Large-Leaved Aster81 obs.

Common Toadflax73 obs.

Japanese knotweed70 obs.

White Turtlehead69 obs.

All wildflowers blooming in Maine in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Flat-Top White Aster	Doellingeria umbellata	Sunflowers, Daisies, Asters, and Allies	337	Aug (past peak)
2	Silverrod	Solidago bicolor	Sunflowers, Daisies, Asters, and Allies	204	Sep (peak)
3	New England aster	Symphyotrichum novae-angliae	Sunflowers, Daisies, Asters, and Allies	132	Sep (peak)
4	Whorled Wood Aster	Oclemena acuminata	Sunflowers, Daisies, Asters, and Allies	117	Aug (past peak)
5	Northern Seaside Goldenrod	Solidago sempervirens	Sunflowers, Daisies, Asters, and Allies	111	Aug (past peak)
6	Common Jewelweed	Impatiens capensis	balsam family	110	Aug (past peak)
7	Pearly Everlasting	Anaphalis margaritacea	Sunflowers, Daisies, Asters, and Allies	110	Aug (past peak)
8	Common Wrinkle-Leaved Goldenrod	Solidago rugosa	Sunflowers, Daisies, Asters, and Allies	86	Sep (peak)
9	Large-Leaved Aster	Eurybia macrophylla	Sunflowers, Daisies, Asters, and Allies	81	Aug (past peak)
10	Common Toadflax	Linaria vulgaris	Plantain Family	73	Sep (peak)
11	Japanese knotweed	Reynoutria japonica	knotweed family	70	Sep (peak)
12	White Turtlehead	Chelone glabra	Plantain Family	69	Aug (past peak)
13	Common Blue Wood Aster	Symphyotrichum cordifolium	Sunflowers, Daisies, Asters, and Allies	60	Sep (peak)
14	Bluestem Goldenrod	Solidago caesia	Sunflowers, Daisies, Asters, and Allies	53	Sep (peak)
15	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	50	Jul (past peak)
16	Red Clover	Trifolium pratense	Legumes	48	Jun (past peak)
17	Cardinal Flower	Lobelia cardinalis	bellflower family	44	Aug (past peak)
18	Calico Aster	Symphyotrichum lateriflorum	Sunflowers, Daisies, Asters, and Allies	43	Sep (peak)
19	Rugosa Rose	Rosa rugosa	rose family	42	Aug (past peak)
20	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	40	Sep (peak)
21	Orange Hawkweed	Pilosella aurantiaca	Sunflowers, Daisies, Asters, and Allies	38	Jun (past peak)
22	Flat-Topped Goldenrod	Euthamia graminifolia	Sunflowers, Daisies, Asters, and Allies	37	Aug (past peak)
23	Purple Loosestrife	Lythrum salicaria	lythrum family	33	Aug (past peak)
24	Nodding Beggarticks	Bidens cernua	Sunflowers, Daisies, Asters, and Allies	32	Sep (peak)
25	White Meadowsweet	Spiraea alba	rose family	32	Jul (past peak)
26	Swamp Laurel	Kalmia polifolia	heath family	31	Jun (past peak)
27	Common Tansy	Tanacetum vulgare	Sunflowers, Daisies, Asters, and Allies	29	Aug (past peak)
28	Broad-Leaved Goldenrod	Solidago flexicaulis	Sunflowers, Daisies, Asters, and Allies	29	Sep (peak)
29	Sheep Laurel	Kalmia angustifolia	heath family	27	Jun (past peak)
30	American Witch-Hazel	Hamamelis virginiana	witch-hazel family	25	Oct (rising)
31	Common Selfheal	Prunella vulgaris	Mint Family	23	Jul (past peak)
32	Swamp Aster	Symphyotrichum puniceum	Sunflowers, Daisies, Asters, and Allies	23	Aug (past peak)
33	Ghost Pipe	Monotropa uniflora	heath family	22	Jul (past peak)
34	Common Boneset	Eupatorium perfoliatum	Sunflowers, Daisies, Asters, and Allies	22	Aug (past peak)
35	Purple Crownvetch	Securigera varia	Legumes	22	Jul (past peak)
36	Common Yarrow	Achillea millefolium	Sunflowers, Daisies, Asters, and Allies	20	Jul (past peak)
37	Herb Robert	Geranium robertianum	Geranium family	20	Aug (past peak)
38	Rabbitfoot Clover	Trifolium arvense	Legumes	19	Jul (past peak)
39	Canadian bunchberry	Cornus canadensis	Dogwood family	18	Jun (past peak)
40	Canada toadflax	Linaria canadensis	Plantain Family	16	Jun (past peak)
41	Wild Carrot	Daucus carota	carrot family	15	Jul (past peak)
42	Arrow-Leaved Tearthumb	Persicaria sagittata	knotweed family	15	Aug (past peak)
43	Purple Pitcher Plant	Sarracenia purpurea	New World pitcher plants	14	Jun (past peak)
44	White Clover	Trifolium repens	Legumes	14	Jul (past peak)
45	Bird's-Foot Trefoil	Lotus corniculatus	Legumes	13	Jul (past peak)
46	American hog-peanut	Amphicarpaea bracteata	Legumes	13	Aug (past peak)
47	Fireweed	Chamaenerion angustifolium	evening primrose family	12	Jul (past peak)
48	Tufted Vetch	Vicia cracca	Legumes	11	Jul (past peak)
49	Creeping Thistle	Cirsium arvense	Sunflowers, Daisies, Asters, and Allies	11	Jul (past peak)
50	Blue Vervain	Verbena hastata	Verbena Family	11	Aug (past peak)