Narrow-leaf Milkweed (Asclepias fascicularis) is a slender, upright California native perennial and one of the most important milkweeds for Western monarch butterflies. Clusters of small lavender-pink flowers bloom from summer through fall, followed by slender seedpods that split to release silky-tufted seeds on the wind.

Growing: Sow in fall for natural cold stratification, or cold-stratify seeds for 30 days before spring sowing. Plant in full sun with low to moderate water. Deep taproot makes established plants drought-tolerant and long-lived.

Wildlife: Essential larval host plant for monarch butterflies. Flowers attract a wide range of native bees, wasps, and butterflies.

Narrow-leaf Milkweed Seeds (Asclepias fascicularis)

Name: Narrow-leaf Milkweed Seeds (Asclepias fascicularis)
SKU: 857641046115

SKU: 857641046115

$4.99

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Plant Type: Herbaceous perennial; dies back in winter

Mature Size: 2–4 ft tall

Native Range: California and Pacific Northwest; valleys, foothills, and roadsides

Flower Color: Lavender-pink

Bloom Time: Summer through fall
Sun: Full sun

Water: Low to moderate — drought tolerant once established

Soil: Well-drained; sandy, loam, or rocky; avoid heavy clay

USDA Zones: 6–10

Drought Tolerant: Yes — deep taproot
Sow Time: Fall (direct sow) or spring after 30-day cold stratification

Sowing Depth: 1/4 inch

Germination: 14–21 days with adequate cold stratification

Tip: Cold stratify seeds in a damp paper towel in the refrigerator for 30 days before spring sowing to improve germination rates

Approx. Seed Count: [TBD — please fill in]
Attracts: Monarch butterflies, native bees, wasps, hummingbirds

Host Plant For: Monarch butterfly (Danaus plexippus) — primary larval host in California

Deer Resistant: Moderately — milky sap is mildly toxic; deer generally avoid

Narrow-leaf Milkweed Seeds (Asclepias fascicularis)

Plant Profile

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