When does California Milkweed bloom?

California Milkweed typically flowers from April through July, producing clusters of dusty purple blooms on upright stems.

How much water does California Milkweed need?

This plant is adapted to low water conditions and does best with infrequent irrigation once established, similar to other dryland milkweeds.

What pollinators visit California Milkweed?

Butterflies, bees, and moths visit California Milkweed for nectar, and it also serves as a host plant for monarch caterpillars.

What growing conditions does California Milkweed prefer?

It grows best in full sun with well drained, dry soil, making it a good fit for hot, exposed sites and low water landscaping.

Is California Milkweed toxic to dogs?

Yes. California 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 California Milkweed toxic to cats?

Yes. California 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 California Milkweed HOA-friendly?

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

California Milkweed

Name: Pollinator Patch
Author: Pollinator Patch

Asclepias californica

Last reviewed: September 2026

California Milkweed is a drought tolerant forb that blooms from April through July in full sun. It suits dry, sunny slopes and low water gardens.

California Milkweed (Asclepias californica) — Photo: (c) Amy, some rights reserved (CC BY)

California Milkweed is toxic to dogs and cats.

Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-06-03). 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.

Is Milkweed Toxic to Dogs? covers the symptoms, what to do after exposure, and safe native swaps.

Light

full sun

Water

low

Size

12"–36" H × 18"–36" W

Bloom

Apr, May, Jun, Jul

Native to

Pollinators

butterflies, bees, moths

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Browse plants for this ecoregion

Sierra Nevada Central California Foothills and Coastal Mountains Central California Valley Southern California Mountains Southern California/Northern Baja Coast

California milkweed is a drought-tolerant perennial that produces clusters of pink to white flowers from spring through summer. This compact native grows in a bushy form and goes dormant in winter, dying back to the ground before returning in spring.

Growing California Milkweed

Grow California Milkweed in full sun and low water. Mature plants reach 12 to 36 inches tall and spread 18 to 36 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

California 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.

Sprawling, woolly gray habit can read as weedy
Goes dormant in summer heat and winter

Wildlife value

Host plant for monarch butterfly, queen butterfly.

Essential host plant for monarch butterflies and attracts a wide variety of native bees and moths. The flowers provide crucial nectar sources during the growing season.

Common questions

When does California Milkweed bloom?: California Milkweed typically flowers from April through July, producing clusters of dusty purple blooms on upright stems.
How much water does California Milkweed need?: This plant is adapted to low water conditions and does best with infrequent irrigation once established, similar to other dryland milkweeds.
What pollinators visit California Milkweed?: Butterflies, bees, and moths visit California Milkweed for nectar, and it also serves as a host plant for monarch caterpillars.
What growing conditions does California Milkweed prefer?: It grows best in full sun with well drained, dry soil, making it a good fit for hot, exposed sites and low water landscaping.
Is California Milkweed toxic to dogs?: Yes. California 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 California Milkweed toxic to cats?: Yes. California 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 California Milkweed HOA-friendly?: California 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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Common plant problems, and what to check first

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