Swamp Aster (Symphyotrichum puniceum) is in the Sunflowers, Daisies, Asters, and Allies family (Asteraceae). Across the U.S., iNaturalist users have logged 917 research-grade flowering observations of it in our sample, peaking in September.
Nationally it blooms mainly from August to September, but timing varies a lot by state and elevation — see the table below.
When to photograph Swamp Aster: observations by month (U.S.)
About Swamp Aster
Symphyotrichum puniceum (formerly Aster puniceus), commonly known as purplestem aster, red-stalk aster, red-stemmed aster or swamp aster, is an herbaceous perennial native to eastern North America. It also has several names that are now obsolete, such as early purple aster and meadow scabish.From Wikipedia via iNaturalist — article, CC BY-SA.
Swamp Aster by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Vermont | 440 | September | Aug–Sep |
| New Hampshire | 83 | September | Aug–Sep |
| Michigan | 56 | September | Aug–Sep |
| Maine | 55 | August | Aug–Sep |
| New York | 54 | September | Aug–Sep |
| Massachusetts | 41 | September | Sep–Oct |
| North Carolina | 41 | October | Sep–Oct |
| Minnesota | 34 | September | Aug–Sep |
| Pennsylvania | 30 | September | Sep–Oct |
| Wisconsin | 26 | August | Aug–Sep |
| Virginia | 11 | October | Oct–Oct |
| Connecticut | 8 | September | Sep–Sep |
| West Virginia | 8 | September | Aug–Sep |
| New Jersey | 7 | September | Sep–Sep |
| Georgia | 5 | October | Oct–Oct |
| Indiana | 5 | September | Sep–Oct |
| Ohio | 5 | September | Sep–Sep |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (Sunflowers, Daisies, Asters, and Allies)
black-eyed Susan
Common Yarrow
White Snakeroot
Chicory
Lawn daisy
Philadelphia fleabane
Pearly Everlasting
Blue Mistflower
Photography tips
- Photograph flowers on calm, overcast mornings to avoid wind blur and harsh shadows.
- Get low: a shallow depth of field (f/2.8–f/5.6) isolates a bloom against soft color.
- Stay on trails — trampling meadows kills plants and ruins next year's display.
- Try a kaleidoscope abstract of a single bloom with our online kaleidoscope tool.
FAQ
When is the best time to photograph Swamp Aster?
Nationally, September has the most observations, with the main season from August to September.
Where is Swamp Aster most often seen?
The most observations come from Vermont, New Hampshire, Michigan.