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Narrowleaf Milkweed

Asclepias fascicularis
As low as $85.83
In stock
  • Premium Quality
  • Custom Tailored
  • Expert Guidance
Growing Region:
Full Sun
Germination Rate:



20” – 48”


Light Purple Pink White

Low Water
Native to US:


Life Form:




Product Specifications:

Seeding Rate: 5 lbs. / Acre

Description: Narrowleaf Milkweed, or Asclepias fascicularis, is a perennial herb native to California and Mexico. Growing with a range of white, pink, and lavender flowers, this wildflower is an essential host plant for butterflies, especially the Monarch butterfly.


Narrowleaf Milkweed (Asclepias fascicularis) Quick Facts

  • Native to the United States
  • Perennial plant with narrow, lance-shaped leaves
  • Clusters of vibrant pink or purple flowers bloom from late spring season to summer
  • Great for growing zones 6-10
  • Important for supporting pollinators, especially monarch butterflies
  • Emits a delightful fragrance
  • Ideal plant for butterfly gardens
  • Thrives in full sun and well-drained, moderately fertile soil
  • Plant seeds at a depth of 1/8 to 1/4 inch
  • Water seeds regularly, but avoid overwatering
  • Apply organic mulch to retain moisture and suppress weeds
  • Trim dead or damaged leaves and stems for healthy growth
  • Generally does not require heavy fertilization
  • Does great in dry climates or in a warm greenhouse
  • Drought tolerant


What is Narrowleaf Milkweed?

Narrowleaf milkweed, scientifically known as Asclepias fascicularis, is a perennial herb with distinctive long pointed leaves. It is native from Southeast Washington and adjacent Idaho through California, Oregon, into Baja California, and west into Nevada. As a member of the milkweed species, narrowleaf milkweed plays a crucial role in supporting pollinators, particularly monarch butterflies.

Also called Mexican whorled milkweed, this plant serves as a host for monarch caterpillars, providing them with a vital food source and a place to lay their eggs. Like other milkweed species, it is a larval host plant to these pollinators.

Narrowleaf milkweed's flowering season is the late spring or early summer and will last through fall. It is drought tolerant and prefers well-drained soils. Narrowleaf milkweed plants can grow up to 48 inches tall. Additionally, narrowleaf milkweed emits a delightful fragrance that adds to its overall appeal.


Why Grow Narrowleaf Milkweed?

There are numerous reasons why you should consider growing narrowleaf milkweed plants in your yard or garden. First and foremost, the stunning Mexican whorled milkweed plant adds beauty and fragrance to any outdoor space.

Additionally, narrow-leaf milkweed is crucial for supporting pollinators, particularly monarch caterpillars and butterflies. By growing milkweed plants, you provide a valuable food source and habitat for these beloved butterflies, allowing you to create your own personal butterfly garden and help pollinate plants in the area.

Moreover, narrowleaf milkweed is native to the United States, making native milkweeds an excellent choice for those who want to promote and preserve native plant species. Growing Mexican whorled milkweed is a rewarding and beneficial experience for you and the environment.


Planting and Maintenance Tips for a Thriving Garden

Once your narrow-leaf milkweed seeds are ready, it's time to start planting! Choose a sunny spot in your garden with well-drained soil. Plant the seeds at a depth of 1/8 to 1/4 inch and water regularly to keep the soil moist.

Be careful not to overwater the seeds, as Asclepias fascicularis prefers moderately fertile soil. Applying organic mulch can help the seeds retain moisture and suppress weeds. Keep an eye out for pests and diseases, and treat them if necessary.

Remember to trim any dead or damaged leaves and stems from your milkweed to encourage healthy growth. With these tips, your Mexican whorled milkweed garden will thrive!


The Role of Narrowleaf Milkweed Plants in the Ecosystem

Asclepias fascicularis plants play a vital role in the ecosystem, particularly when it comes to supporting beneficial insects, flowers, and other plants in North America. As a host to monarch butterflies and caterpillars, milkweed plants provide essential food and shelter.

The nectar-rich flowers attract a wide range of pollinators, including bees, contributing to your lawn's overall health and biodiversity.

Additionally, milkweed plants can serve as companion plants, helping to deter pests. Incorporating milkweeds into your landscape creates a thriving environment that benefits plants and insects alike.

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