Bottomland Aster
Symphyotrichum ontarionis
Last reviewed: June 2026
Light
full sun
Water
medium
Size
12"–36" H × 12"–24" W
Bloom
Aug, Sep, Oct
Native to
AL, IA, IL, IN and 18 more states
Pollinators
bees, butterflies
Browse plants for this ecoregion
Ontario aster is a compact native wildflower that produces clusters of small white to pale lavender flowers from late summer through fall. This well-behaved perennial forms neat clumps and provides reliable color when many other plants are fading for the season.
In an HOA neighborhood
Bottomland 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.
- Appears weedy to unfamiliar observers
- Dies back completely in winter leaving bare spots
- May spread beyond intended boundaries
Wildlife value
The abundant small flowers attract bees, butterflies, and other beneficial insects during the crucial late-season nectar period. Seeds provide food for goldfinches and other small birds in fall and winter.
Common questions
- How much sun does Bottomland Aster need?
- Bottomland Aster grows best in full sun conditions.
- When does Bottomland Aster bloom?
- Bottomland Aster blooms in August, September, and October.
- Where is Bottomland Aster native?
- Bottomland Aster (Symphyotrichum ontarionis) is native to AL, IA, IL, IN and 18 more states, per the USDA PLANTS Database and regional native plant society lists.
- What pollinators does Bottomland Aster attract?
- Bottomland Aster draws bees and butterflies.
- Is Bottomland Aster HOA-friendly?
- Bottomland Aster takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Bottomland Aster? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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