Hall's aster
Symphyotrichum hallii
Last reviewed: September 2026
Hall's aster (Symphyotrichum hallii) is a perennial forb native to OR, WA. It blooms in August, September, and October. The flowers draw native bees and butterflies. It reads as an intentional, HOA-friendly planting in the right spot.
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 458 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaPicture natives in your own yard
Upload a photo of your yard and Patch Vision shows a rendering of it planted with natives for your region, like Hall's aster.
Browse plants for this ecoregion
A 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.
Growing Hall's aster
Grow Hall's aster in full sun and high water. Mature plants reach 12 to 30 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
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.
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 Hall's aster? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.