Hall's aster
Symphyotrichum hallii
Last reviewed: August 2026
Toxicity unknown
Hall's aster (Symphyotrichum hallii) 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.
Light
full sun
Water
high
Size
12"–30" H × 12"–24" W
Bloom
Aug, Sep, Oct
Native to
OR, WA
Pollinators
native bees, butterflies
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 445 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaA rhizomatous perennial wildflower with narrow, lance-shaped leaves and small daisy-like flowers carried on branching stems. Blooms in late summer into fall with pale flower heads surrounding a yellow center, providing color after most other perennials have finished flowering. Prefers consistently moist to seasonally wet soil and full sun, forming loose colonies over time.
In an HOA neighborhood
Hall's aster is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.
Works well in: back and side yards, naturalized borders, rain gardens.
- can look informal without visible edging
- needs consistently moist soil, which may not suit a typical dry front-yard bed
Wildlife value
A valuable late-season nectar source for native bees and butterflies at a time when few other flowers are blooming, helping support pollinators preparing for fall and winter.
Common questions
- How much sun does Hall's aster need?
- Hall's aster grows best in full sun conditions.
- When does Hall's aster bloom?
- Hall's aster blooms in August, September, and October.
- Where is Hall's aster native?
- Hall's aster (Symphyotrichum hallii) is native to OR, WA, per vouchered herbarium specimen records and regional native plant society lists.
- What pollinators does Hall's aster attract?
- Hall's aster draws native bees and butterflies.
- Is Hall's aster HOA-friendly?
- Hall's aster is generally an HOA-friendly choice in the right placement, with low maintenance.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Hall's 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