Wildflowers Blooming in California in September (60 Species)

60 wildflowers were recorded blooming in California in September in our iNaturalist sample; 9 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Top wildflowers in September

California fuchsia1,987 obs.

Coyote Brush855 obs.

Vinegar Weed841 obs.

California Aster404 obs.

Hayfield Tarweed396 obs.

Sacred Datura376 obs.

Telegraphweed319 obs.

Scarlet Monkeyflower303 obs.

California poppy293 obs.

Alkali Heliotrope285 obs.

Chinchweed276 obs.

Bull Thistle267 obs.

All wildflowers blooming in California in September

#	Species	Scientific name	Family	Obs.	Peak in state
1	California fuchsia	Epilobium canum	evening primrose family	1,987	Oct (rising)
2	Coyote Brush	Baccharis pilularis	Sunflowers, Daisies, Asters, and Allies	855	Oct (rising)
3	Vinegar Weed	Trichostema lanceolatum	Mint Family	841	Sep (peak)
4	California Aster	Corethrogyne filaginifolia	Sunflowers, Daisies, Asters, and Allies	404	Aug (past peak)
5	Hayfield Tarweed	Hemizonia congesta	Sunflowers, Daisies, Asters, and Allies	396	Sep (peak)
6	Sacred Datura	Datura wrightii	nightshade family	376	May (past peak)
7	Telegraphweed	Heterotheca grandiflora	Sunflowers, Daisies, Asters, and Allies	319	Sep (peak)
8	Scarlet Monkeyflower	Erythranthe cardinalis	lopseed family	303	Jul (past peak)
9	California poppy	Eschscholzia californica	Poppy Family	293	Apr (past peak)
10	Alkali Heliotrope	Heliotropium curassavicum	borage family	285	Jul (past peak)
11	Chinchweed	Pectis papposa	Sunflowers, Daisies, Asters, and Allies	276	Oct (rising)
12	Bull Thistle	Cirsium vulgare	Sunflowers, Daisies, Asters, and Allies	267	Jul (past peak)
13	California Buckwheat	Eriogonum fasciculatum	knotweed family	245	Jun (past peak)
14	Turkey Mullein	Croton setiger	Spurge Family	227	Jul (past peak)
15	Narrowleaf Milkweed	Asclepias fascicularis	Dogbane Family	210	Jul (past peak)
16	Anderson's thistle	Cirsium andersonii	Sunflowers, Daisies, Asters, and Allies	205	Jul (past peak)
17	Common Madia	Madia elegans	Sunflowers, Daisies, Asters, and Allies	201	Jul (past peak)
18	Lawn daisy	Bellis perennis	Sunflowers, Daisies, Asters, and Allies	196	Apr (past peak)
19	Pearly Everlasting	Anaphalis margaritacea	Sunflowers, Daisies, Asters, and Allies	188	Aug (past peak)
20	California Wild Rose	Rosa californica	rose family	188	Jun (past peak)
21	Yellow Star-Thistle	Centaurea solstitialis	Sunflowers, Daisies, Asters, and Allies	179	Jul (past peak)
22	Naked Buckwheat	Eriogonum nudum	knotweed family	178	Jul (past peak)
23	Tree Tobacco	Nicotiana glauca	nightshade family	178	Apr (past peak)
24	White Clover	Trifolium repens	Legumes	174	Apr (past peak)
25	marsh grass-of-Parnassus	Parnassia palustris	staff-vine family	169	Aug (past peak)
26	Laurel Sumac	Malosma laurina	Cashew Family	162	Jul (past peak)
27	Rubber Rabbitbrush	Ericameria nauseosa	Sunflowers, Daisies, Asters, and Allies	159	Sep (peak)
28	Common Selfheal	Prunella vulgaris	Mint Family	146	Jun (past peak)
29	Poison Hemlock	Conium maculatum	carrot family	143	May (past peak)
30	Bladderpod	Cleomella arborea	Spider Flower Family	138	Feb (past peak)
31	Red Clover	Trifolium pratense	Legumes	129	Jun (past peak)
32	Oregon woodsorrel	Oxalis oregana	Woodsorrel Family	128	Sep (peak)
33	Common Yarrow	Achillea millefolium	Sunflowers, Daisies, Asters, and Allies	122	Apr (past peak)
34	Pennyroyal	Mentha pulegium	Mint Family	122	Jul (past peak)
35	Yellow Sand Verbena	Abronia latifolia	four o'clock family	117	Jun (past peak)
36	Orange Bush Monkeyflower	Diplacus aurantiacus	lopseed family	111	Apr (past peak)
37	Puncture Vine	Tribulus terrestris	caltrops	109	Sep (peak)
38	Parish's Goldeneye	Bahiopsis parishii	Sunflowers, Daisies, Asters, and Allies	109	Mar (past peak)
39	Chicory	Cichorium intybus	Sunflowers, Daisies, Asters, and Allies	106	Jul (past peak)
40	European Searocket	Cakile maritima	mustard family	105	Jul (past peak)
41	California brittlebush	Encelia californica	Sunflowers, Daisies, Asters, and Allies	105	Apr (past peak)
42	Western Columbine	Aquilegia formosa	buttercup family	104	Jun (past peak)
43	Island Mallow	Malva assurgentiflora	Mallow and Hibiscus Family	102	Sep (peak)
44	Field Bindweed	Convolvulus arvensis	bindweed family	101	May (past peak)
45	Scarlet Pimpernel	Lysimachia arvensis	primrose family	98	Apr (past peak)
46	Seaside Daisy	Erigeron glaucus	Sunflowers, Daisies, Asters, and Allies	97	Jul (past peak)
47	Desert Willow	Chilopsis linearis	bignonia family	97	Sep (peak)
48	Horseweed	Erigeron canadensis	Sunflowers, Daisies, Asters, and Allies	95	Sep (peak)
49	Leichtlin's Mariposa Lily	Calochortus leichtlinii	lily family	94	Jul (past peak)
50	Spotted spurge	Euphorbia maculata	Spurge Family	92	Oct (rising)