When does frost aster bloom?

Frost aster blooms from August through October, with masses of small white flowers appearing late in the growing season as many other plants finish flowering.

What pollinators does frost aster attract?

Bees, butterflies, and beetles regularly visit frost aster for nectar and pollen, making it a useful late-season food source as fall approaches.

How much light and water does frost aster need?

Frost aster does best in full sun with medium soil moisture, though it tolerates drier conditions once its roots are established.

What kind of habitat does frost aster prefer?

It grows well in open fields, meadows, roadsides, and other disturbed or sunny ground, often forming dense clumps of narrow leaves topped with small flowers.

Is Michaelmas Daisy toxic to livestock?

The USDA PLANTS Database does not flag Michaelmas Daisy as toxic to livestock.

Is Michaelmas Daisy HOA-friendly?

Michaelmas Daisy takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Michaelmas Daisy

Name: Pollinator Patch
Author: Pollinator Patch

Symphyotrichum pilosum

Last reviewed: August 2026

Symphyotrichum pilosum, or frost aster, covers itself in small white daisy-like flowers from August through October. It grows well in full sun with medium water and is common in open fields, meadows, and roadsides.

Toxicity unknown

Michaelmas Daisy (Symphyotrichum pilosum) 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 Michaelmas Daisy as toxic to livestock.

Light

full sun

Water

medium

Size

12"–48" H × 12"–36" W

Bloom

Aug, Sep, Oct

Native to

AL, AR, CT, DE and 30 more states

Pollinators

bees, butterflies, beetles

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Michaelmas daisy produces clouds of small white flowers with yellow centers from late summer through fall. This hardy perennial forms upright clumps that can spread gradually and provides excellent late-season color when many other plants are finished blooming.

Growing Michaelmas Daisy

Grow Michaelmas Daisy in full sun and medium water. Mature plants reach 12 to 48 inches tall and spread 12 to 36 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Michaelmas Daisy takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Can appear weedy and unkempt during growing season
Tends to flop or become leggy without maintenance
May spread aggressively and look wild

Wildlife value

Host plant for silvery checkerspot, pearl crescent.

The abundant small flowers attract bees, butterflies, and beetles during the critical late summer and fall period when nectar sources become scarce. This plant is especially valuable for migrating monarchs and other butterflies preparing for winter.

Common questions

When does frost aster bloom?: Frost aster blooms from August through October, with masses of small white flowers appearing late in the growing season as many other plants finish flowering.
What pollinators does frost aster attract?: Bees, butterflies, and beetles regularly visit frost aster for nectar and pollen, making it a useful late-season food source as fall approaches.
How much light and water does frost aster need?: Frost aster does best in full sun with medium soil moisture, though it tolerates drier conditions once its roots are established.
What kind of habitat does frost aster prefer?: It grows well in open fields, meadows, roadsides, and other disturbed or sunny ground, often forming dense clumps of narrow leaves topped with small flowers.
Is Michaelmas Daisy toxic to livestock?: The USDA PLANTS Database does not flag Michaelmas Daisy as toxic to livestock.
Is Michaelmas Daisy HOA-friendly?: Michaelmas Daisy takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

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.

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