White Snakeroot

(Ageratina altissima)

White Snakeroot (Ageratina altissima)

H. Zell

CC BY-SA 3.0

Image By: H. Zell

Recorded By:

Copyright Notice: Photo by: H. Zell | License Type: CC BY-SA 3.0 | License URL: https://creativecommons.org/licenses/by-sa/3.0 | Uploader: Llez | Publisher: Wikimedia Commons | Title: Ageratina_altissima_002.JPG | Notes: == Beschreibung == {{Information |Description= ''Agrostis stolonifera'', kriechende Wuchsform |Source= own work |Date= 12.September 2006 |Author=[[User:Zirpe|Alfred]] |Permission= |other_versions= }} [[Category:Agrostis]] == Licensing == {{self2|GFDL|cc- |

Native Range

Native / Invasive

Climate Requirements

• Precipitation	33" - 49"
• High Temp.	80°F - 88°F
• Low Temp.	13°F - 25°F

Enter location for climate suitability and irrigation needs

Summary

Ageratina altissima, commonly known as White Snakeroot, is a deciduous perennial herb that thrives in the understory of deciduous forests, often in rich, moist soils along streams and in woodland clearings in the Eastern and Central United States, as well as in parts of Canada. It can reach up to 1.5 meters (4.9 ft) in height and tends to form single or multi-stemmed clumps. White Snakeroot blooms from mid to late summer into fall, featuring fluffy clusters of small, clean white flowers that are quite showy. Following the flowering period, it produces small seeds with fluffy white tails that are dispersed by the wind. This plant is particularly noted for its ability to thrive in shaded conditions, though it prefers part shade.

White Snakeroot is valued for its ease of maintenance and its ability to provide late-season blooms when many other plants have finished flowering. It is often used in naturalized plantings, woodland gardens, and shaded borders. While it prefers moist soils, it is relatively adaptable and can tolerate full sun to part shade, with varying water requirements. Gardeners should be aware that Ageratina altissima contains tremetol, a toxin that can be harmful to livestock if ingested. It can spread easily through wind-dispersed seeds, so care should be taken to manage its growth. CC BY-SA 4.0

Plant Description

Plant Type: Herb
Height: 3-5 feet
Width: 2-4 feet
Growth Rate: Moderate
Flower Color: White
Flowering Season: Fall
Leaf Retention: Deciduous

Growth Requirements

Sun: Full Sun, Part Shade
Drainage: Slow, Medium, Fast

Common Uses

Bee Garden, Bird Garden, Border Plant, Butterfly Garden, Deer Resistant, Drought Tolerant, Erosion Control, Fragrant, Showy Flowers

Natural Habitat

Understory of deciduous forests, often in rich, moist soils along streams and in woodland clearings

Other Names

Common Names: White Sanicle, Richweed, Weiße Natternwurz, Eupatoire À Feuilles Molles, Eupatoire Rugueuse, Rostflockel, 서양등골나물, Tall Eupatorium

Scientific Names: Eupatorium rugosum, Ageratina altissima, Eupatorium urticaefolium, Eupatorium ageratoides, Ageratum altissimum, Ageratina ageratoides, Eupatorium rugosum var. chlorolepis, Eupatorium rugosum var. tomentellum, Eupatorium rugosum var. villicaule

GBIF Accepted Name: Ageratina altissima (L.) R.King & H.Rob.