Asclepias Species, Whorled Milkweed, Whorled-leaf Milkweed, Horsetail Milkweed

Asclepias verticillata

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Asclepias (ass-KLE-pee-us) (Info)
Species: verticillata (ver-ti-si-LAH-tuh) (Info)
Synonym:Asclepias galioides
Synonym:Asclepias linifolia
Synonym:Asclepias parviflora



Water Requirements:

Drought-tolerant; suitable for xeriscaping

Sun Exposure:

Full Sun



Foliage Color:

Unknown - Tell us


24-36 in. (60-90 cm)


24-36 in. (60-90 cm)


USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Where to Grow:

Unknown - Tell us


Parts of plant are poisonous if ingested

Bloom Color:

Pale Green

White/Near White

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Other details:

May be a noxious weed or invasive

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From herbaceous stem cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

From seed; direct sow after last frost

Seed Collecting:

Bag seedheads to capture ripening seed

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored


This plant is said to grow outdoors in the following regions:

Morrilton, Arkansas

Gainesville, Florida

Itasca, Illinois

La Grange Park, Illinois

Rock Falls, Illinois

Pacific Junction, Iowa

Yale, Iowa

Olathe, Kansas

Shawnee Mission, Kansas

Royal Oak, Michigan

Minneapolis, Minnesota(2 reports)

Helena, Montana

Doniphan, Nebraska

Albuquerque, New Mexico

Wilkes Barre, Pennsylvania

Arlington, Texas

Austin, Texas

Leesburg, Virginia

show all

Gardeners' Notes:


On Jul 20, 2015, Chillybean from (Zone 5a) wrote:

I discovered this plant along the gravel road next to my property today. Based on the skirted flower, I knew right away it was a Milkweed and found the ID through a quick search. It is native to North America and thrives best in exposed, infertile soil.

I pulled one up to take pictures when I got home, but made a quick decision to put it next to our driveway. The roots were shallow, so it might be a first year plant. Only about half of the flowers were opened up at this point. If this survives, I will place the seed in our prairie patch.

It does not appear to be a preferred host for the Monarch, so do not plant this for that purpose only. But do not forget all the equally interesting insects out there who will partake of this. In an earlier article ... read more


On Dec 15, 2012, KnightsScore from Greater Upper Marlboro, MD wrote:

This plant (and most milkweeds) are poisonous to horses and should not be planted where there is a possibility they could self seed and become a problem. All natives are not necessarily desireable. Whorled milkweed was determined to be the cause of death of several horses in Dec 2012.


On May 9, 2010, juba_stan from Olathe, KS wrote:

I got this plant in Lawrence at a monarch butterfly conservation event. I planted it it near a short path of natural stones, and it looks so nice. It has a few small stalks gently weeping out from the center and they have a nicer green color. The pictures of the flowers are pretty, it will be nice to have a later blooming plant and I hope it may attract monarchs so planting it wasn't just a random placeing of a flower.


On Aug 10, 2009, Mrs_Ed from Whiteside County, IL (Zone 5a) wrote:

This is a native plant in Illinois. I purchased one this year from a center that sells natives. Later I found it growing in a conservation area along a hillside. I love how the slender pine needle-like leaves contrast with the grasslands around it in the wild.


On Jul 29, 2008, Danny112596 from Los Fresnos, TX (Zone 10a) wrote:

Whorled Milkweed also grows in Zone 10! ( you just need to use Cold Moist Stratification on the seeds so the germinate in zone 10).


On Feb 22, 2008, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:

The most eastern of the narrowleaf milkweed species, of which most species are located in Western North America. Strongly linked to sandy soils or dry locations. I have seen at least one large patch along a highway in Maple Grove, Minnesota.


On Nov 30, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

Whorled Milkweed, Whorled-leaf Milkweed, Asclepias verticilata is Native to Texas and other States.