Bog Aster
Symphyotrichum puniceum
Last reviewed: September 2026
Bog aster produces purple, daisy-like flowers from August through October and grows best in consistently wet soil found in marshes, bogs, and pond margins across the eastern and midwestern United States.
Toxicity unknown
Bog Aster (Symphyotrichum puniceum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag Bog Aster as toxic to livestock.
Light
part sun
Water
high
Size
24"–60" H × 12"–36" W
Bloom
Aug, Sep, Oct
Native to
AL, CT, DE, GA and 27 more states
Pollinators
bees, butterflies, beetles
Before you buy
Your city may pay you to plant this
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Bog aster is a tall native perennial that produces masses of small purple flowers from late summer through fall. This moisture-loving wildflower naturalizes well in consistently wet areas and can form attractive colonies over time.
Growing Bog Aster
Grow Bog Aster in part sun and high water. Mature plants reach 24 to 60 inches tall and spread 12 to 36 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Bog Aster takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Very tall and informal appearance
- Can look weedy when dormant
- May spread aggressively in wet conditions
Wildlife value
The late-season blooms provide crucial nectar for migrating butterflies and native bees when few other flowers remain. Seeds support songbirds through winter.
Common questions
- When does bog aster bloom?
- Bog aster blooms from August through October, with purple ray flowers surrounding a yellow center.
- How much water does bog aster need?
- This plant needs consistently moist to wet soil and tolerates standing water, which is why it does well along pond edges, marshes, and bogs.
- How much sunlight does bog aster need?
- Bog aster grows well in part sun to full sun and can handle partial shade as long as the soil stays consistently moist.
- What insects visit bog aster flowers?
- Bees, butterflies, and beetles visit bog aster for nectar and pollen during its late summer and fall bloom period.
- Is Bog Aster toxic to livestock?
- The USDA PLANTS Database does not flag Bog Aster as toxic to livestock.
- Is Bog Aster HOA-friendly?
- Bog Aster takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Bog Aster? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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