Clasping Heart-leaf Aster
Symphyotrichum undulatum
Last reviewed: September 2026
Clasping Heart-leaf Aster is a woodland forb that blooms from August through October across the eastern United States, thriving in part sun with medium moisture in open woods and forest edges.
Toxicity unknown
Clasping Heart-leaf Aster (Symphyotrichum undulatum) 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
part sun
Water
medium
Size
12"–48" H × 12"–36" W
Bloom
Aug, Sep, Oct
Native to
AL, CT, DE, FL and 21 more states
Pollinators
bees, butterflies, moths
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 452 programs across 44 states, each with a link to the provider and the date we last checked it.
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Wavyleaf aster is a native wildflower that produces masses of small, pale blue to white daisy-like flowers from late summer through fall. This hardy perennial forms neat clumps with distinctive wavy-edged leaves and tolerates a wide range of growing conditions.
Growing Clasping Heart-leaf Aster
Grow Clasping Heart-leaf Aster in part sun and medium water. Mature plants reach 12 to 48 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
Clasping Heart-leaf Aster is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.
Works well in: foundation, mid zone.
- May appear wild or weedy to unfamiliar neighbors
- Can look sparse in winter when dormant
Wildlife value
The abundant late-season blooms provide crucial nectar for migrating butterflies, native bees, and moths when few other flowers are available. Seeds also feed songbirds through winter.
Common questions
- When does Clasping Heart-leaf Aster bloom?
- It typically flowers from August through October, producing small lavender to pale purple blooms late in the growing season.
- What pollinators visit Clasping Heart-leaf Aster?
- Bees, butterflies, and moths are common visitors to its flowers, which provide a late-season nectar source as many other plants finish blooming.
- How much sun and water does Clasping Heart-leaf Aster need?
- It grows best in part sun with medium soil moisture, though it tolerates conditions from full sun to part shade and from medium to lower moisture once established.
- Does Clasping Heart-leaf Aster stay green year-round?
- No, it is an herbaceous perennial forb that dies back to the ground each fall and sends up new growth from its base the following spring.
- Is Clasping Heart-leaf Aster HOA-friendly?
- Clasping Heart-leaf Aster is generally an HOA-friendly choice in the right placement, with low maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
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 Clasping Heart-leaf Aster? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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