Narrowleaf Milkweed
Asclepias fascicularis · Apocynaceae
- Form
- Perennial
- Height
- 2–4 ft
- Sun
- Full Sun
- Water
- Low
- Blooms
- May, Jun, Jul, Aug, Sep
- Pet toxicity
- Toxic
- Habitat
- Grassland · Coastal Sage Scrub · Riparian
🌿 California native
Quick facts
- Habitat: Grassland, open scrub, roadsides, dry creek terraces
- Form / size: Upright perennial, 2–4 ft
- Sun: Full sun · Water (established): Low
- Blooms: Late spring–fall · Pollinator value: High
Description
A slender native milkweed with narrow leaves arranged in whorls along upright stems. Rounded clusters of small white-to-pink flowers become long, pointed pods packed with silky windborne seed. The plant often dies back to the ground in winter.
Wildlife & pollinators
Host plant for monarch butterflies and a nectar source for bees, wasps, flies, and other beneficial insects. Expect leaves to be eaten; that is the point.
Habitat & range
Open slopes, grasslands, roadsides, dry creek terraces, and disturbed edges across much of California.
In the garden
The go-to local milkweed for monarch habitat in Southern California. Plant several in full sun, avoid pesticides, and let the stems stand long enough for seed pods and insect life.
Propagation
Grow from seed sown in fall or winter. Fresh seed often germinates well with seasonal moisture; older seed may benefit from cold-moist stratification.
Where to see it near you
- iNaturalist — observed in Orange County
- Open grassland/scrub edges, roadsides, and habitat gardens.
Problems
Toxic if eaten by pets or livestock. Aphids are common; rinse or tolerate them rather than using insecticide on a butterfly host plant.
