Late Purple Aster

Name: Pollinator Patch
Author: Pollinator Patch

Symphyotrichum patens

Last reviewed: September 2026

Late purple aster is a fall blooming forb that flowers from June through November in full sun with low water needs, attracting butterflies and bees.

Toxicity unknown

Late Purple Aster (Symphyotrichum patens) 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.

The USDA PLANTS Database (opens in new tab) does not flag Late Purple Aster as toxic to livestock.

Light

full sun

Water

low

Size

24"–48" H × 24"–36" W

Bloom

Jun, Jul, Aug, Sep, Oct, Nov

Native to

AL, AR, CT, DE and 25 more states

Pollinators

butterflies, bees

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.

Find rebates in your area

Late Purple Aster produces masses of small purple flowers with bright yellow centers from summer through late fall. This sturdy perennial grows in an upright clump and provides excellent late-season color when many other plants are finishing their blooming cycle. The plant goes dormant in winter but returns reliably each spring.

Growing Late Purple Aster

Grow Late Purple Aster in full sun and low water. Mature plants reach 24 to 48 inches tall and spread 24 to 36 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Late Purple Aster is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.

Works well in: mid zone, backyard only.

May flop without support
Best in less formal zones

Wildlife value

This native aster is a crucial late-season nectar source for butterflies, including monarchs preparing for migration. It also attracts native bees and other beneficial insects during its extended bloom period.

Common questions

When does Late Purple Aster bloom?: Late Purple Aster typically flowers from late summer into fall, with blooms appearing from June through November depending on local conditions.
What pollinators visit Late Purple Aster?: The flowers draw a range of butterflies and bees, which use the late season blooms as a nectar source when many other plants have finished flowering.
How much water does Late Purple Aster need?: This plant tolerates low to medium moisture and does well in drier soils once established, making it a good fit for garden beds that are not regularly irrigated.
How much sun does Late Purple Aster need?: It grows best in full sun but can also handle part sun conditions, especially where afternoon shade is light.
What growing conditions suit Late Purple Aster in the eastern and midwestern US?: In the states where it occurs, from the Northeast through the Midwest, South, and into Texas, it favors open, sunny sites such as fields, roadsides, and dry woodland edges.
Is Late Purple Aster toxic to livestock?: The USDA PLANTS Database does not flag Late Purple Aster as toxic to livestock.
Is Late Purple Aster HOA-friendly?: Late Purple 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.

See all plant problem guides

Ready to grow Late Purple Aster? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Add this plant to your garden

iPhone app Android app

Planning a bed around it? Start a free plan with this plant

Not sure where to start? Take the 2-minute yard quiz

Common questions

When does Late Purple Aster bloom?

Late Purple Aster typically flowers from late summer into fall, with blooms appearing from June through November depending on local conditions.

What pollinators visit Late Purple Aster?

The flowers draw a range of butterflies and bees, which use the late season blooms as a nectar source when many other plants have finished flowering.

How much water does Late Purple Aster need?

This plant tolerates low to medium moisture and does well in drier soils once established, making it a good fit for garden beds that are not regularly irrigated.

How much sun does Late Purple Aster need?

It grows best in full sun but can also handle part sun conditions, especially where afternoon shade is light.

What growing conditions suit Late Purple Aster in the eastern and midwestern US?

In the states where it occurs, from the Northeast through the Midwest, South, and into Texas, it favors open, sunny sites such as fields, roadsides, and dry woodland edges.

Is Late Purple Aster toxic to livestock?

The USDA PLANTS Database does not flag Late Purple Aster as toxic to livestock.

Is Late Purple Aster HOA-friendly?

Late Purple 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.

Common plant problems, and what to check first

See all plant problem guides