Tall Aster
Symphyotrichum praealtum
Last reviewed: June 2026
Symphyotrichum praealtum (Tall Aster) is a native wildflower blooming August through October across eastern and central North America. This adaptable perennial attracts bees, butterflies, and moths with its purple fall flowers.
Light
full sun
Water
medium
Size
24"–60" H × 12"–36" W
Bloom
Aug, Sep, Oct
Native to
AL, AR, CT, DE and 28 more states
Pollinators
bees, butterflies, moths
Browse plants for this ecoregion
Aromatic Aster is a tall native wildflower that produces masses of small white to pale purple flowers from late summer through fall. This robust perennial spreads to form colonies and provides excellent late-season color when many other plants are finishing their bloom cycle.
Growing Tall Aster
Grow Tall Aster in full sun and medium 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
Tall 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.
- Can appear weedy and unkempt to conventional standards
- Tends to spread aggressively and may look wild
- Very tall growth may violate height restrictions
Wildlife value
The abundant flowers are crucial for late-season pollinators including native bees, butterflies, and moths preparing for winter. Seeds provide food for birds through fall and winter months.
Common questions
- When does Symphyotrichum praealtum bloom?
- Tall Aster blooms from August through October, providing important late-season nectar when many other flowers have finished.
- What pollinators visit Symphyotrichum praealtum?
- Tall Aster attracts bees, butterflies, and moths. The fall blooms are particularly valuable for migrating monarch butterflies and late-season native bees.
- Where is Symphyotrichum praealtum native?
- Tall Aster is native across much of eastern and central North America, from Maine to Florida and west to Texas, Kansas, and Minnesota.
- What growing conditions does Tall Aster prefer?
- Symphyotrichum praealtum grows well in full sun to partial sun with medium moisture, though it tolerates a wide range of water conditions from wet to dry soils.
- Is Tall Aster HOA-friendly?
- Tall 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 Tall Aster? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz