Whorled Milkweed Seeds - (Asclepias verticillata)

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Seed Count:
Approx 20 seeds per pack
Seed Sales Support:
Arizona Milkweeds for Monarchs
Elevation Range:
1,000 -
up to 3'
Native, Non-Hybrid, Non-GMO seeds
  • Whorled Milkweed Flowers - (Asclepias verticillata)
  • Whorled Milkweed Flowers - (Asclepias verticillata)
  • Whorled Milkweed Flowers - (Asclepias verticillata)
  • Whorled Milkweed Flowers - (Asclepias verticillata)
  • Whorled Milkweed Seeds - (Asclepias verticillata)

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Whorled Milkweed - (Asclepias verticillata)  

Typically short-statured with thin, whorled leaves. Due to its narrow leaves and stems, this species blends in with grasses and is easily overlooked when not in bloom. It spreads by lateral roots to form large colonies. This milkweed blooms late in the season, and is a common late season host plant for monarch larvae. 

A broad distribution across the country, it will grow in sand, clay or rocky soils.


May to September

Will these grow in my area?

The range of these milkweed species is not limited to Arizona but in most cases the entire southwest and beyond. Refer to the USDA map link and please realize that a milkweed species can grow and thrive outside of the areas listed if the conditions are favorable.

From that link, you’ll see the states shown where the milkweed is native. If you find a state that has areas with climate and conditions similar to yours, then that milkweed will most likely do very well for you. 


Milkweed pods contain a seed floss that is used to stuff pillows or mixed with other fibers to make a cloth. It is used in Life Jackets or as a stuffing material. It is very water repellent. The floss is the mechanism for seed dispersal.

Why this milkweed is special

This milkweed seed is the highest quality available anywhere. It is hand-grown across central and northern Arizona, hand-harvested, hand-cleaned, and hand-packed. Over the past five years it has been test-grown in different elevations to verify the vigor and adaptability to different conditions. 

Terroir Seeds is proud to be the exclusive partner in offering these unique milkweed seeds to home gardeners. The sale of each packet of milkweed seeds directly supports the continued, on-going research of Arizona Milkweeds for Monarchs organization, a dedicated volunteer citizen science research organization that is overseen by professional scientists from Northern Arizona University. 

The milkweed plant (Asclepias spp.) plays a critical role in the monarch life cycle. Each spring Monarchs move across the United States, laying eggs on native milkweed, the only plant that serve as food for newly hatched monarch caterpillars. Arizona has more than 40 species of milkweed - more than 50% of the total diversity of milkweeds in the continental US - giving it the second greatest diversity of milkweeds next to Texas. 

Other Names

  • Linear-leaved milkweed
  • Eastern Whorled Milkweed

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1 Review

  • 5
    Good Stuff

    Posted by BobWellington on Oct 21, 2019

    The seeds germinated well. Hopefully next year I'll get some nice flowers from this highly beneficial native.

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