Ageratina altissima

white snakeroot add to wishlist

x

Some plants might not be available to you due to quarantine restrictions, or nursery limitations.

To make it easier for you to buy locally, we will sort the available nurseries based on their distance to your garden.

Ageratina altissima (White snakeroot)
  • Ageratina altissima (White snakeroot)
  • Ageratina altissima (White snakeroot)

Ageratina altissima

white snakeroot, tall boneset

Plant types and subtypes:
Perennials

Light Requirements: sun, part-sun, part-shade, shade

Water Use: low

Soil Moisture: dry, moist

Soil Description: acid, rich, average, poor, clay, gravel/rock

Height: 2'-4'

Bloom Time: July, August, September, October

Bloom Color: white

Leaf Color: green

Hardiness Zone: 2, 3, 4, 5, 6, 7, 8

Native Range: AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, ND, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV

Additional Tags: attracts bees, clumping, colonizing, cottage garden plant, drought tolerant, naturalizing, poisonous, rock garden plant, shade garden plant, woodland garden plant

Ageratina altissima

white snakeroot, tall boneset

Description

Ageratina altissima grows up to 4' tall. It is a clumping plant that produces more stems as it matures. Terminal clusters of abundant, small, white flowers appear in late summer, and can persist until frost.

Cultivation

Very easy to cultivate in a variety of soils and light conditions. It is drought tolerant, but foliage and blooms will decline earlier in a sunny, or dry location. It will slowly spread by rhyzomes, or more aggressively from seed. Ideal to naturalize in moist open locations. A good choice for cottage, and rock gardens, though it is recommended to remove spend flowers before they go to seed, to avoid unwanted spread. Flowers persist late in the season, when very little else is in bloom; July to October. Zones 2-8

Propagation

Self seeds readily. Clumps can be divided in early spring. Plants have taproots. This makes them drought tolerant, but hard to dig out, particularly in heavy clay.

Additional Notes

The common name "snakeroot" is a reference to the early belief that the roots where a cure for snakebite. In fact all parts of the plant are highly toxic and can be fatal to animals and humans if ingested in large quantities. It was later discovered that these toxins are passed on to humans through cow's milk, causing "milk sickness". Fortunately, grazers avoid this plant and only forage on it as a last resort. Ageratina altissima was previously classified as Eupatorium rugosum.

Ageratina altissima

white snakeroot

Recorded County Distribution: USDA data

Native Range:
AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, ND, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV

USDA Endangered Status:

Ageratina altissima

white snakeroot

Scientific Synonyms

Common Synonyms

tall boneset

Classification

Kingdom Plantae Plants
Subkingdom Tracheobionta Vascular plants
Superdivision Spermatophyta Seed plants
Division Magnoliophyta Flowering plants
Class Magnoliopsida Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae Aster family
Genus Ageratina snakeroot
Species Ageratina altissima white snakeroot

Ageratina altissima

x

Some plants might not be available to you due to quarantine restrictions, or nursery limitations.

To make it easier for you to buy locally, we will sort the available nurseries based on their distance to your garden.