White Snakeroot Plant Care

White Snakeroot (Ageratina altissima) belongs to the Asteraceae family within the Ageratina genus. White Snakeroot is native to eastern and central North America. White Snakeroot is also known as Tall White Snakeroot, Ageratina ageratoides, Ageratum altissimum.

White Snakeroot displays an upright, bushy shrub growth habit, reaching up to 3 inches tall with a spread of approximately 2 inches. White Snakeroot produces clusters of small white or pink flowers in flat-topped inflorescences.

Leaf size: approximately 4 inches.

Ageratina altissima requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

White Snakeroot thrives in full sun to partial shade light conditions. The optimal light range is 200–1000 lux. Avoid placing White Snakeroot in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Ageratina altissima grows best at temperatures between 50°F and 85°F. White Snakeroot prefers humidity levels of 40–70%.

Well-draining loamy soil with added organic matter for moisture retention. Good drainage is essential for White Snakeroot to prevent waterlogging, which leads to root rot and fungal issues.

Repot every 1-2 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

White Snakeroot can be propagated through seeds, division of root ball.

White Snakeroot is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

White Snakeroot grows outdoors in USDA Zone 4a – 9b. Native to eastern and central North America, White Snakeroot is adapted to warm climates. In cooler regions, grow White Snakeroot as a houseplant or bring it indoors before the first frost.