Sorbus americana
TAXONOMY
FamilyRosaceae
GenusSorbus
Zone3
LEARN MORE
Plants of the World OnlineABOUT
Sorbus americana, commonly known as the American Mountain Ash, is a deciduous tree native to North America, particularly in the northeastern United States and southeastern Canada. It belongs to the Rosaceae family and the Sorbus genus. This tree is known for its clusters of bright red berries and pinnate leaves. It thrives in temperate climates and can grow up to 30 feet tall. The tree undergoes a dormancy period during the winter months.
ALSO KNOWN AS
American Mountain Ash
American Mountain-Ash
Dogberry
Mountain-Ash
Aucuparia americana
Pyrus americana
Pyrus americana var. microcarpa
Pyrus microcarpa
Sorbus americana
Sorbus americana var. microcarpa
Sorbus aucuparia
Sorbus micrantha
Sorbus microcarpa
Sorbus riparia
OVERVIEW
VPDCalculate
WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature15° C
Humidity60%
Dormancy4 Months
pH6.5
Pressure1,013 mbar
DETAILS
Care Instructions
The American Mountain Ash requires moderate temperatures and prefers full sunlight for optimal growth. It should be watered regularly, allowing the soil to dry out partially between waterings. The tree thrives in moderate humidity and should be protected from extreme heat and cold.Soil
Sorbus americana prefers well-draining loamy soil with a slightly acidic to neutral pH. The soil should be kept moderately moist but not waterlogged. Good drainage is essential to prevent root rot.Fertilizer
A balanced fertilizer with an N-P-K ratio of 10-10-10 can be applied in the spring to support healthy growth. Fertilize once a year, taking care not to over-fertilize, as this can harm the tree.Repotting
Repotting is generally not necessary for outdoor trees. However, if grown in a container, repot every 2-3 years to refresh the soil and provide more space for root growth. Choose a container with good drainage and use a well-draining soil mix.Propagation
Propagation of Sorbus americana can be done through seeds or cuttings. Seeds should be stratified before planting, while cuttings can be taken in late summer. Ensure the cuttings have at least one node and plant them in a well-draining soil mix.Pruning
Pruning should be done in late winter or early spring before new growth begins. Remove any dead, diseased, or damaged branches to maintain the tree's shape and health. Thinning out crowded branches can also improve air circulation.Toxicity
Sorbus americana is not known to be toxic to pets or humans. However, the berries, while not highly toxic, can cause mild stomach upset if ingested in large quantities.Additional
The American Mountain Ash is valued for its ornamental appeal, particularly its vibrant red berries that attract birds. It is also relatively resistant to pests and diseases, making it a good choice for temperate gardens.REVOLUTIONIZE YOUR PLANT CARE
Make Every Plant Smart
Plant Monitor
STAYS IN YOUR PLANT
Accurately measures the core metrics of your plant – soil moisture, light, temperature and humidity - as well as compound metrics such as Vapor Pressure Deficit (VPD) and Growing Degree Days (GDD).
Shop Now
