When does Purple Milkweed bloom?

Purple Milkweed typically flowers in June and July, producing rounded umbels of rich purple to rose-colored blooms.

What pollinators visit Purple Milkweed?

Bees, butterflies, and moths regularly visit the flowers for nectar, and the plant also serves as a host for monarch caterpillars like other milkweed species.

How much light and water does Purple Milkweed need?

It grows best in full sun to part sun with consistently medium soil moisture, though established plants can handle brief drier spells.

What growing conditions suit Purple Milkweed?

This forb favors open woodland edges, meadows, and roadsides with well-drained but not overly dry soil, doing well in gardens that mimic those sunny, moderately moist sites.

Is Purple Milkweed toxic to dogs?

Yes. Purple Milkweed is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Purple Milkweed toxic to cats?

Yes. Purple Milkweed is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Purple Milkweed HOA-friendly?

Purple Milkweed is generally an HOA-friendly choice in the right placement, with low maintenance.

Purple Milkweed

Name: Pollinator Patch
Author: Pollinator Patch

Asclepias purpurascens

Last reviewed: September 2026

Purple Milkweed is an upright forb that blooms in June and July with clusters of deep purple-pink flowers. It grows best in full sun with medium moisture and draws bees, butterflies, and moths.

Purple Milkweed (Asclepias purpurascens) — Photo: (c) Matt Pelikan, some rights reserved (CC BY)

Purple Milkweed is toxic to dogs and cats.

Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-05-21). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.

Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.

Light

full sun

Water

medium

Size

12"–36" H × 12"–24" W

Bloom

Jun, Jul

Native to

AL, AR, CT, DE and 30 more states

Pollinators

bees, butterflies, moths

Deer

Resistant (per Prairie Moon Nursery)

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Purple milkweed produces clusters of deep rose-purple flowers on sturdy upright stems in early to mid-summer. This native perennial forms neat clumps and goes dormant in winter, returning reliably each spring with attractive oval leaves.

Growing Purple Milkweed

Grow Purple Milkweed in full sun and medium water. Mature plants reach 12 to 36 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

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

Works well in: front yard, foundation, street edge, mid zone.

Goes completely dormant in winter
May self-seed in optimal conditions

Wildlife value

Host plant for monarch butterfly.

Essential host plant for monarch butterfly caterpillars and provides nectar for various butterflies, bees, and moths. The flowers are particularly attractive to native bees and long-tongued butterflies.

Common questions

When does Purple Milkweed bloom?: Purple Milkweed typically flowers in June and July, producing rounded umbels of rich purple to rose-colored blooms.
What pollinators visit Purple Milkweed?: Bees, butterflies, and moths regularly visit the flowers for nectar, and the plant also serves as a host for monarch caterpillars like other milkweed species.
How much light and water does Purple Milkweed need?: It grows best in full sun to part sun with consistently medium soil moisture, though established plants can handle brief drier spells.
What growing conditions suit Purple Milkweed?: This forb favors open woodland edges, meadows, and roadsides with well-drained but not overly dry soil, doing well in gardens that mimic those sunny, moderately moist sites.
Is Purple Milkweed toxic to dogs?: Yes. Purple Milkweed is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Purple Milkweed toxic to cats?: Yes. Purple Milkweed is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Purple Milkweed HOA-friendly?: Purple Milkweed 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.

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