White Snakeroot

Ageratina Altissima

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Overview

White Snakeroot (Ageratina altissima) is a perennial herb that thrives in partial shade, reaching 3-5 feet in height. Renowned for its late-summer bloom of fluffy white flower clusters, this North American native is excellent for adding texture to shaded garden areas. Preferring moist, well-drained soil, it's a hardy choice that attracts pollinators while being wary around pets due to toxicity. Space plants approximately 18-24 inches apart for a lush display.

Sun HalfWater MediumZones 3–8

White Snakeroot (Ageratina Altissima) — Space plants approximately 18-24 inches apart for a lush display

Culture

Sun: Half
Water: Medium
USDA zones: 3–8

Shape & size

Mature height: 3–5 Ft.
Mature width: 2–4 Ft.

Classification

Family: Asteraceae

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Photos (106)

White Snakeroot (Ageratina Altissima) — This North American native plant typically flourishes in hardiness zones 4 through 8; despite its beauty, image 97

White Snakeroot (Ageratina Altissima) — growing to a height of about 3 to 5 feet with a similar spread; white Snakeroot (Ageratina altissima) is a, image 98

White Snakeroot (Ageratina Altissima) — well-draining soils but demonstrates adaptability to a range of soil types; as all parts of Ageratina, image 100

White Snakeroot (Ageratina Altissima) — making it an excellent understorey component or a component for areas with dappled sunlight; is a perennial, image 99

White Snakeroot (Ageratina Altissima) — Each flower head is relatively tiny; perennial for half, image 101

White Snakeroot (Ageratina Altissima) — they create a dramatic effect.<br><br>Care should be taken; commonly referred to as White Snakeroot, image 102

White Snakeroot (Ageratina Altissima) — Despite its beauty, it is hazardous to livestock and can indirectly affect humans through dairy products, image 104

White Snakeroot (Ageratina Altissima) — as all parts of Ageratina altissima contain tremetol; they create a dramatic effect.<br><br>Care should be, image 103

White Snakeroot (Ageratina Altissima) — The plant can spread vigorously, so periodic division may be necessary to control its growth; each flower, image 106

White Snakeroot (Ageratina Altissima) — Informing the client of the potential toxicity is crucial; space plants approximately 18-24 inches apart, image 105

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