Narrowleaf Milkweed, Asclepius Fascicularis, is native to California. It is drought resistant once established. It dies off in the winter, which both reduces the parasite population and encourages monarch migration.
|Botanical Name||Asclepias fascicularis||Common Name||Narrowleaf or California Milkweed|
|Plant Type||Herbaceous perennial||Bloom Time||Summer, Fall|
|Mature Size||1.7 – 3.3 ft tall, 1 ft wide||Flower Color||White, Lavender, Pink|
|Sun Exposure||Full sun||Hardiness Zones||Zone 9 (SF Bay Area)|
|Fertilizer||None Necessary||Planting Depth (Seeds)||1”|
|Soil pH||6.0 – 8.0||Plant Spacing||18”|
|Soil Type||Any well-drained soil; tolerates clay soil and poor, dry conditions|
|NOTE 1:||Can be toxic to children or pets if consumed in large amounts|
|NOTE 2:||Can be a bit invasive, plant where you can manage it or where it’s okay to spread|
|Water:||Needs water for only the first year or two until the tap root is established.|
|Native Area||Throughout California except on coast and deserts|
Special thanks to the folks at Mid City Nursery in American Canyon, CA for discounting Narrowleaf Milkweed plants for the Monarch Milkweed Project!
Sources: Calscape: https://calscape.org/Asclepias-fascicularis-()