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)

Category:

Perennials

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

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

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Where to Grow:

Unknown - Tell us

Height:

24-36 in. (60-90 cm)

Spacing:

24-36 in. (60-90 cm)

Hardiness:

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)

Sun Exposure:

Full Sun

Danger:

Parts of plant are poisonous if ingested

Bloom Color:

Pale Green

White/Near White

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Foliage:

Herbaceous

Other details:

May be a noxious weed or invasive

Soil pH requirements:

Unknown - Tell us

Patent Information:

Non-patented

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

Regional

This plant has been said to grow 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

Minneapolis, Minnesota (2 reports)

Helena, Montana

Doniphan, Nebraska

Albuquerque, New Mexico

Wilkes Barre, Pennsylvania

Arlington, Texas

Austin, Texas

Leesburg, Virginia

show all

Gardeners' Notes:

5
positives
1
neutral
1
negative
RatingContent
Positive

On Jul 20, 2015, Chillybean from Near Central, IA (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

Negative

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.

Positive

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.

Neutral

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.

Positive

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).

Positive

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.

Positive

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.