Asteraceae

common white snakeroot

Ageratina altissima

Synonyms

Eupatorium rugosum
Eupatorium urticifolium

Other Common Names

common milk-poison

Plant Type

Herbaceous Wildflower

Life Cycle

Perennial

Typical Size

2-5 ft. tall
2-4 ft. wide

Tolerant of

Drought

Inolerant of

Poorly Drained Soil

Propagation

By seed

Plant Propagation Notes

Seeds require cold moist stratification for at least 60 days and must be surface sowed to germinate.

Plants/Diseases

Susceptible to leaf miners and flea beetles.

Wildlife Benefits

Nectar/pollen source for pollinating insects, Fruit/seeds for birds

Leaves

Leaves simple, opposite with toothed margins.

Flowers

White disc flowers with no ray flowers arranged in a corymb.

Fruit

Achene.

Toxicity

All parts of the plant are toxic should not be consumed by humans or livestock.

Ageratina altissima

USDA Hardiness Zones

3, 4, 5, 6, 7, 8, 9

Light Exposure

Full Sun, Part Sun/Shade

Soil Moisture

Medium, Moist

Soil Drainage

Well-drained

Soil pH

Acidic (less than 6.0), Neutral (6.0-8.0)

Native in South Carolina?

Yes

Plant Native Habitat

Moist to mesic forests, successional forests, old fields.

Global Conservation Status (NatureServe)

Secure (G5)

Federal Conservation Status (USFWS)

Not Listed

Distribution Notes

Rare in the coastal plain, uncommon in the piedmont, common in the mountains.