American Mountain Ash Plant Care
Sorbus americana Pursh
The tree species Sorbus americana is commonly known as the American mountain-ash. It is a deciduous perennial tree, native to eastern North America.
Every 7–14 days
Full sun to partial shade
0–90°F
40–70%
What Is the American Mountain Ash?
American Mountain Ash (Sorbus americana) belongs to the Rosaceae family within the Sorbus genus. American Mountain Ash is native to eastern North America. American Mountain Ash is also known as American rowan, Witch hazel.
American Mountain Ash displays an upright, spreading tree growth habit, reaching up to 30 inches tall with a spread of approximately 20 inches. American Mountain Ash produces clusters of white or pink flowers in spring.
Leaf size: approximately 6 inches.
How Often Should You Water a American Mountain Ash?
Sorbus americana requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–14 days
Let soil partially dry between waterings
What Light Does the American Mountain Ash Need?
American Mountain Ash thrives in full sun to partial shade light conditions. The optimal light range is 200–1000 lux. Avoid placing American Mountain Ash in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun to partial shade
200–1000 lux
What Temperature and Humidity Does the American Mountain Ash Prefer?
Sorbus americana grows best at temperatures between 0°F and 90°F. American Mountain Ash prefers humidity levels of 40–70%.
Temperature
0–90°F
Humidity
40–70%
What Soil Mix Works Best for a American Mountain Ash?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for American Mountain Ash to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a American Mountain Ash?
Repot every 2-3 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.
How Do You Propagate a American Mountain Ash?
American Mountain Ash can be propagated through seeds, hardwood cuttings.
Fertilizing
Every 8 months
During the growing season
Is the American Mountain Ash Toxic to Pets and Children?
Non-Toxic
Non-toxic to humans and pets
What Pests and Diseases Affect the American Mountain Ash?
American Mountain Ash is susceptible to aphids, caterpillars, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Keep exploring plants
American Mountain Ash is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Sorbus genus — compare its care with other Sorbus species on PlantoScan.
American Mountain Ash tolerates low-light rooms and shaded spots — browse the full list of low-light plants.
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