Smooth Aster
Symphyotrichum laeve
Last reviewed: June 2026
Smooth Aster is a native wildflower found across most US states that produces purple daisy-like blooms from August through October. This drought-tolerant perennial attracts bees, butterflies, and other pollinators to gardens and natural areas.
The USDA PLANTS Database (opens in new tab) does not flag Smooth Aster as toxic to livestock.
Light
full sun
Water
low
Size
12"–36" H × 12"–24" W
Bloom
Aug, Sep, Oct
Native to
AL, AR, CA, CO and 42 more states
Pollinators
bees, butterflies, beetles
Browse plants for this ecoregion
Smooth aster produces masses of small purple flowers with yellow centers from late summer through fall. This native perennial forms neat clumps with smooth, lance-shaped leaves and sturdy upright stems. It's drought tolerant once established and provides excellent late-season color when many other flowers are fading.
Growing Smooth Aster
Grow Smooth Aster in full sun and low water. Mature plants reach 12 to 36 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Smooth Aster is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- Dies back completely in winter
- May self-seed in ideal conditions
Wildlife value
Host plant for pearl crescent butterfly.
The abundant fall blooms attract bees, butterflies, and beetles when few other nectar sources remain. Seeds provide food for birds through winter.
Common questions
- When does Smooth Aster bloom?
- Smooth Aster blooms from August through October, providing late-season nectar when many other flowers have finished.
- What pollinators visit Smooth Aster?
- Smooth Aster attracts bees, butterflies, and beetles. Its late bloom period makes it especially valuable for migrating monarch butterflies and other fall pollinators.
- Where is Smooth Aster native?
- Smooth Aster is native to most US states, from coast to coast including Alabama, California, Maine, Texas, and many others. It grows naturally in prairies, fields, and open woodlands.
- How much water does Smooth Aster need?
- Smooth Aster is drought-tolerant and thrives with low to moderate water. Once established, it typically requires no supplemental watering in most climates.
- Is Smooth Aster toxic to livestock?
- The USDA PLANTS Database does not flag Smooth Aster as toxic to livestock.
- Is Smooth Aster HOA-friendly?
- Smooth Aster is generally an HOA-friendly choice in the right placement, with low maintenance.
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 Smooth 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