Wildflowers Blooming in Massachusetts in September (60 Species)

60 wildflowers were recorded blooming in Massachusetts in September in our iNaturalist sample; 19 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Mar Apr May Jun Jul Aug Sep Oct Nov

Top wildflowers in September

Common Jewelweed298 obs.

New England aster204 obs.

White Snakeroot201 obs.

Common Toadflax154 obs.

Asiatic dayflower151 obs.

Purple Loosestrife144 obs.

Pinesap143 obs.

Silverrod134 obs.

Red Clover123 obs.

Northern Seaside Goldenrod122 obs.

Chicory117 obs.

Japanese knotweed116 obs.

All wildflowers blooming in Massachusetts in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	Common Jewelweed	Impatiens capensis	balsam family	298	Aug (past peak)
2	New England aster	Symphyotrichum novae-angliae	Sunflowers, Daisies, Asters, and Allies	204	Sep (peak)
3	White Snakeroot	Ageratina altissima	Sunflowers, Daisies, Asters, and Allies	201	Sep (peak)
4	Common Toadflax	Linaria vulgaris	Plantain Family	154	Sep (peak)
5	Asiatic dayflower	Commelina communis	Spiderworts	151	Sep (peak)
6	Purple Loosestrife	Lythrum salicaria	lythrum family	144	Aug (past peak)
7	Pinesap	Monotropa hypopitys	heath family	143	Sep (peak)
8	Silverrod	Solidago bicolor	Sunflowers, Daisies, Asters, and Allies	134	Sep (peak)
9	Red Clover	Trifolium pratense	Legumes	123	Jun (past peak)
10	Northern Seaside Goldenrod	Solidago sempervirens	Sunflowers, Daisies, Asters, and Allies	122	Sep (peak)
11	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	117	Jul (past peak)
12	Japanese knotweed	Reynoutria japonica	knotweed family	116	Sep (peak)
13	White Turtlehead	Chelone glabra	Plantain Family	113	Sep (peak)
14	Common Wrinkle-Leaved Goldenrod	Solidago rugosa	Sunflowers, Daisies, Asters, and Allies	112	Sep (peak)
15	White Wood Aster	Eurybia divaricata	Sunflowers, Daisies, Asters, and Allies	110	Sep (peak)
16	Cardinal Flower	Lobelia cardinalis	bellflower family	105	Aug (past peak)
17	Bull Thistle	Cirsium vulgare	Sunflowers, Daisies, Asters, and Allies	95	Aug (past peak)
18	Bluestem Goldenrod	Solidago caesia	Sunflowers, Daisies, Asters, and Allies	92	Sep (peak)
19	Ghost Pipe	Monotropa uniflora	heath family	85	Jul (past peak)
20	Low Smartweed	Persicaria longiseta	knotweed family	77	Sep (peak)
21	Sweet Everlasting	Pseudognaphalium obtusifolium	Sunflowers, Daisies, Asters, and Allies	77	Sep (peak)
22	Flat-Topped Goldenrod	Euthamia graminifolia	Sunflowers, Daisies, Asters, and Allies	69	Aug (past peak)
23	Autumn Clematis	Clematis terniflora	buttercup family	63	Sep (peak)
24	Wild Carrot	Daucus carota	carrot family	61	Jul (past peak)
25	Common Boneset	Eupatorium perfoliatum	Sunflowers, Daisies, Asters, and Allies	60	Aug (past peak)
26	Common Tansy	Tanacetum vulgare	Sunflowers, Daisies, Asters, and Allies	58	Aug (past peak)
27	Flat-Top White Aster	Doellingeria umbellata	Sunflowers, Daisies, Asters, and Allies	56	Aug (past peak)
28	Whorled Wood Aster	Oclemena acuminata	Sunflowers, Daisies, Asters, and Allies	56	Aug (past peak)
29	American burnweed	Erechtites hieraciifolius	Sunflowers, Daisies, Asters, and Allies	54	Sep (peak)
30	American pokeweed	Phytolacca americana	Pokeweed Family	47	Jul (past peak)
31	Groundsel Tree	Baccharis halimifolia	Sunflowers, Daisies, Asters, and Allies	46	Sep (peak)
32	Blue Curls	Trichostema dichotomum	Mint Family	46	Aug (past peak)
33	White Clover	Trifolium repens	Legumes	42	Jun (past peak)
34	black-eyed Susan	Rudbeckia hirta	Sunflowers, Daisies, Asters, and Allies	39	Jul (past peak)
35	Common Soapwort	Saponaria officinalis	pink family	38	Jul (past peak)
36	Pickerelweed	Pontederia cordata	Pickerelweeds	37	Jul (past peak)
37	Broad-Leaved Goldenrod	Solidago flexicaulis	Sunflowers, Daisies, Asters, and Allies	37	Sep (peak)
38	Arrow-Leaved Tearthumb	Persicaria sagittata	knotweed family	36	Aug (past peak)
39	Blue Vervain	Verbena hastata	Verbena Family	35	Jul (past peak)
40	Great Blue Lobelia	Lobelia siphilitica	bellflower family	35	Sep (peak)
41	Common Blue Wood Aster	Symphyotrichum cordifolium	Sunflowers, Daisies, Asters, and Allies	35	Oct (rising)
42	American hog-peanut	Amphicarpaea bracteata	Legumes	34	Aug (past peak)
43	Rugosa Rose	Rosa rugosa	rose family	33	Jun (past peak)
44	American white waterlily	Nymphaea odorata	Waterlily Family	29	Jul (past peak)
45	Spotted Knapweed	Centaurea stoebe	Sunflowers, Daisies, Asters, and Allies	29	Jul (past peak)
46	Bird's-Foot Trefoil	Lotus corniculatus	Legumes	28	Jun (past peak)
47	Butterfly Milkweed	Asclepias tuberosa	Dogbane Family	28	Jul (past peak)
48	White Campion	Silene latifolia	pink family	28	Jun (past peak)
49	Eastern Black Nightshade	Solanum emulans	nightshade family	28	Aug (past peak)
50	Pale Jewelweed	Impatiens pallida	balsam family	26	Aug (past peak)