Sign up for News & Availability Emails
Site Search:
Asclepias verticillata (horsetail milkweed, whorled milkweed)
Species Distribution Map: Click to enlarge
Map Color Key © 2013 BONAP

Asclepias verticillata

horsetail milkweed, whorled milkweed

A widely adaptable and tough native that is a deer-resistant food for larval butterflies. The fine-textured foliage provides a dark green backdrop for the clusters of white flowers that appear in June and July.

SIZE
Asclepias verticillata LP50 - 50 per flat Availability
Add to My North Creek Nurseries Wish List

Height

1-3 Feet

Spread

1-2 Feet

Spacing

12 Inches

Bloom Color

White

USDA Hardiness Zone 4-8

horsetail milkweed, whorled milkweed Interesting Notes

Asclepias verticillata is a widely adaptable and tough native perennial with fragrant white flowers that bloom later in the summer, notably later than many other Asclepias species. Its smooth, narrow, needle-like whorled foliage superficially resembles field horsetail (Equisetum arvense).

This pioneer species often establishes in disturbed areas in prairies, meadows, roadsides and shale barrens east of the Rocky Mountains. It is best located in a sunny dry spot but will tolerate average to moist garden soil as well.

In our trials, Asclepias verticillata thrives in one of our xeric meadows where it receives no irrigation and blazing southern sun exposure.

Like other milkweed species, it is the food source for larval Monarch butterflies. A vast array of other insects feed on the foliage, flowers, seeds and other plant parts. This species is toxic to mammals so it is a great plant to consider for sites with deer pressure. Please note, Asclepias verticillata is highly toxic to livestock and horses - it should not be allowed to take root in pastures or hayfields.

Asclepias verticillata Growing and Maintenance Tips

Found in dry fields, roadsides and shale barrens - you can see that it needs no coddling. Best located in a sunny dry spot, but will tolerate average to moist garden soil as well.

 

Key Characteristics & Attributes

Full Sun
Full Sun
Part Sun
Part Sun
Songbird-friendly
Songbird-friendly
Deer Resistant
Deer Resistant
Pollinator-friendly
Pollinator-friendly
Drought Tolerant
Drought Tolerant
Summer
Summer

Additional Information

Soil Moisture Needs
Average
Dry
Green Infrastructure
Green Roof
Meadow/Prairie
Wetland Indicator Status
Falcutative Upland (FACU)
Plug Type
Landscape Plug™
For Animals
Caution: Toxic
Attributes
Native to North America
Propagation Type
Open pollinated