How much water does desert milkweed need?

Desert milkweed does well with little supplemental water once established and prefers dry, well drained soil typical of desert washes and open flats.

When does desert milkweed bloom?

It typically flowers from April through August, producing rounded clusters of cream colored blossoms atop upright stems.

What pollinators visit desert milkweed?

Bees, butterflies, and moths regularly visit the flowers, and the plant also serves as a larval host for monarch butterflies.

What light conditions does desert milkweed prefer?

It grows best in full sun and can struggle in heavy shade, reflecting its background in open desert and grassland habitats.

Does desert milkweed keep its leaves year round?

No, it is deciduous and dies back to the root crown during cold spells or long dry periods, resprouting as conditions improve.

Is Desert Milkweed toxic to dogs?

Yes. Desert 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 Desert Milkweed toxic to cats?

Yes. Desert 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 Desert Milkweed HOA-friendly?

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

Desert Milkweed

Name: Pollinator Patch
Author: Pollinator Patch

Asclepias erosa

Last reviewed: September 2026

Desert milkweed is a drought tolerant perennial forb that blooms from April through August in full sun, attracting bees, butterflies, and moths across arid washes and open desert flats.

Desert Milkweed (Asclepias erosa) — Photo: (c) Erin Lalime, some rights reserved (CC BY)

Desert 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

low

Size

12"–36" H × 12"–24" W

Bloom

Apr, May, Jun, Jul, Aug

Native to

AZ, CA, NV, UT

Pollinators

bees, butterflies, moths

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Browse plants for this ecoregion

Sierra Nevada Central California Foothills and Coastal Mountains Central California Valley Southern California Mountains Central Basin and Range Mojave Basin and Range North American Deserts Arizona/New Mexico Mountains Sonoran Basin and Range

Desert milkweed is a hardy perennial that produces clusters of small, creamy white to pale pink flowers from spring through summer. This native plant goes dormant in winter, losing its leaves but returning reliably each year with minimal water requirements.

Growing Desert Milkweed

Grow Desert Milkweed in full sun and low water. Mature plants reach 12 to 36 inches tall and spread 12 to 24 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Desert Milkweed is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.

Works well in: mid zone, backyard only.

Can look weedy when dormant in winter
May self-seed and spread beyond intended areas
Stems can appear scraggly between bloom periods

Wildlife value

Host plant for monarch butterfly, queen butterfly.

Essential host plant for monarch butterfly caterpillars and provides nectar for various butterflies, bees, and moths. Supports monarch butterfly migration.

Common questions

How much water does desert milkweed need?: Desert milkweed does well with little supplemental water once established and prefers dry, well drained soil typical of desert washes and open flats.
When does desert milkweed bloom?: It typically flowers from April through August, producing rounded clusters of cream colored blossoms atop upright stems.
What pollinators visit desert milkweed?: Bees, butterflies, and moths regularly visit the flowers, and the plant also serves as a larval host for monarch butterflies.
What light conditions does desert milkweed prefer?: It grows best in full sun and can struggle in heavy shade, reflecting its background in open desert and grassland habitats.
Does desert milkweed keep its leaves year round?: No, it is deciduous and dies back to the root crown during cold spells or long dry periods, resprouting as conditions improve.
Is Desert Milkweed toxic to dogs?: Yes. Desert 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 Desert Milkweed toxic to cats?: Yes. Desert 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 Desert Milkweed HOA-friendly?: Desert Milkweed is generally an HOA-friendly choice in the right placement, with moderate 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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