Data provided by the participants of the Consortium of California Herbaria

View additional distribution information on the Jepson eflora

California Milkweed (Asclepias californica) is a species in the Apocynaceae (Dogbane) family. It is native to California and northern Baja California from the East Bay region southward and the foothills of the Sierra.

This flowering perennial has thick, white, woolly stems that bend or run along the ground. The plentiful, hanging flowers are rounded structures.

The flowers are dull to bright shades of lavender or pink and form an attractive contrast with the grey-to-white foliage. This plant was eaten as candy by the Kawaiisu tribes of Indigenous California; the milky sap within the leaves is said to be flavorful and chewy when cooked.

To maximize Monarch butterflies reaching their overwintering areas, plant only locally native milkweed species.

Plant type

Perennial herb

Size

3 ft Tall
3 ft Wide

Form

Spreading

Dormancy

Summer Semi-deciduous

Calscape icon
Color

Lavender, Pink, White

Flowering season

Spring, Summer

Special uses

Containers

Sun

Full Sun

Water

Low, Very Low

Summer irrigation

Max 2x / month once established

Cold tolerance

Tolerates cold to 5° F

Soil drainage

Fast, Medium, Slow

Soil description

Tolerates sand and clay.
Soil PH: 6.0 - 8.0

Propagation

For propagating by seed: No treatment.

Site type

Dry slopes, canyons, foothills with chaparral or woodlands; also disturbed areas, roadcuts

Plant communities

Chaparral, Pinyon-Juniper Woodland, Yellow Pine Forest

Milkweeds are most often used to create a butterfly garden. A wide variety of trees and shrubs can be used, including Madrone (Arbutus menziesii), Pines (Pinus spp.), Junipers (Juniperus spp.), Manzanita (Arctostaphylos spp.), Ceanothus spp., Oaks (Quercus spp.), and Coyote Brush (Baccharis spp.). Also include other butterfly-attracting herbs such as members of the Asteraceae family, other Milkweeds (Asclepias fascicularis or A. speciosa), Thistles (Cirsium spp.), Buckwheat (Eriogonum spp.), Mint (Monardella spp.), and Sage (Salvia spp.). To provide year-round attraction, mix early bloomers with late bloomers and evergreens with deciduous.

Hummingbirds
Bees
Butterflies

Pollinators supported

1 confirmed and 190 likely

  • Likely

  • Confirmed

Crotch's Bumble Bee

Bombus crotchii

Aetole extraneella

Angelic Sweat Bee

Agapostemon angelicus

Orange-bellied Sweat Bee

Agapostemon melliventris

See all

Chicory

Cichorium intybus

Squash (Cucurbita)

Cucurbita

Buckwheat

Fagopyrum esculentum

Strawberries

Fragaria