Korean Mountain Ash Sorbus scalaris ambig.
ABOUT
The appearance of Sorbus scalaris, commonly known as the Showy Mountain Ash, is characterized by its attractive foliage and fruiting characteristics. The leaves of this plant are compound, typically comprising a number of small, pointed leaflets arranged in a feather-like pattern along a central stem. The leaves are generally green but can take on spectacular hues of orange, red, and purple as the seasons change, particularly in the fall. The Showy Mountain Ash is also well-known for its clusters of small, white flowers that bloom in the spring, creating a contrasting display against the backdrop of the fresh green leaves. These flowers are a nectar source for various pollinators and mature into vividly colored fruit in the late summer or fall. The fruit typically takes the form of small, round berries that range in color from bright red to a deep orange, adding visual interest and providing food for birds and wildlife. The overall appearance of the Showy Mountain Ash is elegant and ornamental, often contributing to its selection as a decorative plant in gardens and landscape settings. Its foliage and fruit features make it a standout through multiple seasons, offering a dynamic and changing display throughout the year. The bark of the plant is generally smooth with a grey to brown color, adding a subtle textural element to its appealing aesthetics.
About this plant
NamesFamily
Rosaceae.
Synonyms
No common names available.
Common names
Sorbus scalaris.
ToxicityTo humans
The Sorbus scalaris, commonly known as the mountain ash or rowan, is not considered highly toxic to humans. However, like many plants, parts of it may contain compounds that could be harmful if ingested in large quantities. The berries of the rowan are edible when cooked and are often used to make jellies and jams. Raw berries may cause stomach upset or more significant digestive distress if consumed in large amounts due to the presence of parasorbic acid, which can be toxic. Symptoms of ingestion of large quantities of raw berries might include nausea, vomiting, diarrhea, and abdominal pain.
To pets
The mountain ash or rowan is not typically listed as a highly toxic plant to pets. However, as with humans, the raw berries may cause mild gastrointestinal upset in some animals if ingested in significant amounts due to the presence of parasorbic acid. Symptoms of ingesting raw berries could include vomiting, diarrhea, or abdominal discomfort. It is generally advised to prevent pets from consuming large quantities of raw plant material to avoid any potential issues.
CharacteristicsLife cycle
Perennials
Foliage type
Deciduous
Color of leaves
Green
Flower color
White
Height
20 feet (6 meters)
Spread
15 feet (4.5 meters)
Plant type
Tree
Hardiness zones
6
Native area
Asia
Benefits
General Benefits- Ornamental appeal: Sorbus scalaris, commonly known as Korean Mountain Ash, has decorative features like white flowers and bright red berries that enhance aesthetic beauty of gardens and landscapes.
- Wildlife attraction: The tree provides a habitat and food source for birds and other wildlife, particularly with its berries.
- Shade provider: This species can offer a moderate amount of shade for outdoor areas, making it useful for planting in parks and recreation areas.
- Seasonal interest: Leaves of Korean Mountain Ash change color in autumn, providing seasonal color variation and visual interest.
- Drought tolerance: Once established, it has the ability to withstand periods of low rainfall, making it suitable for drier climates or water-conserving gardens.
- Soil enrichment: As a deciduous tree, it contributes to soil health through leaf litter, which decomposes and enriches the soil with organic matter.
Medical PropertiesThis plant is not used for medical purposes.
Air-purifying QualitiesThis plant is not specifically known for air purifying qualities.
Other Uses- The wood of Sorbus scalaris, commonly known as the Korean mountain ash, can be used for woodworking projects such as making small decorative items or tool handles due to its fine-grain structure.
- The bark of Korean mountain ash may be used in tanning leather, as it contains tannins that help in the process of converting animal hides into leather.
- Fruits from the Korean mountain ash can be made into a natural dye for fabrics, imparting a range of colors from green to brown depending on the mordant used.
- The resilient wood of Korean mountain ash is suitable for creating walking sticks or canes, offering both sturdiness and aesthetic appeal.
- Korean mountain ash is sometimes planted in urban environments as a traffic noise buffer due to its dense foliage.
- With its attractive autumn foliage, the tree is often used in landscape design to create visually pleasing environments, especially in autumn-themed gardens.
- The tree can be utilized for bonsai, allowing enthusiasts to cultivate a miniature version of the Korean mountain ash with its striking features.
- In rural areas, the fallen leaves of Sorbus scalaris can be used as a natural mulch to conserve soil moisture and reduce weed growth.
- Bird enthusiasts might plant the Korean mountain ash to attract various bird species to their garden, as birds are attracted to its berries.
- The tree's dense branching can be leveraged as a natural privacy screen or windbreak in residential landscapes.
Interesting Facts
Feng ShuiThe Mountain Ash is not used in Feng Shui practice.
Zodiac Sign CompitabilityThe Mountain Ash is not used in astrology practice.
Plant Symbolism- Protection: Sorbus scalaris, commonly known as Rowan, is often associated with protection. In European folklore, the Rowan tree is thought to guard against malevolent forces.
- Wisdom: The Rowan tree symbolizes wisdom. It is considered a tree of knowledge, possibly because of its connection to ancient druidic traditions.
- Curiosity: Its intricate patterns and gradual growth reflect a sense of curiosity and the importance of a slow but steady quest for knowledge.
WaterThe Sorbus scalaris, commonly known as the Mountain Ash or Rowan, prefers to be consistently moist but not waterlogged. Water deeply once a week during the growing season, providing about 1.5 gallons for a young tree, increasing the amount as the tree matures and the root system expands. During hot and dry periods, you may need to water twice a week, while in cooler weather, reduce the frequency. Always check the soil moisture levels before watering to avoid overwatering, which can lead to root rot.
LightMountain Ash trees thrive in full sun to partial shade. They should be planted in a spot where they receive at least six hours of direct sunlight daily. However, in extremely hot climates, they can benefit from some afternoon shade to prevent leaf scorch.
TemperatureThe Mountain Ash is hardy and can tolerate a wide range of temperatures. It can survive winters with temperatures dropping to -30°F and is comfortable in summer temperatures up to 85°F. The ideal temperature range for this tree is between 50°F and 75°F.
PruningPruning the Mountain Ash is necessary to maintain its shape, remove diseased or damaged branches, and promote healthy growth. The best time to prune is in the late winter or early spring before new growth starts. Thin out crowded branches annually, and remove any crossing or rubbing branches to improve air circulation.
CleaningAs needed
SoilThe Japanese Rowan, also known as Sorbus scalaris, thrives best in well-draining, loamy soil. A soil pH range of 5.5 to 7.5 is ideal. Amend soil with organic matter like compost to enhance texture.
RepottingThe Japanese Rowan should be repotted every 2-3 years in spring or autumn to encourage healthy growth and to refresh the soil.
Humidity & MistingThe Japanese Rowan prefers moderate to high humidity levels, but it is quite adaptable and can tolerate different atmospheric moisture conditions.
Suitable locationsIndoor
Place Japanese Rowan near a sunny window and ensure good air circulation.
Outdoor
Plant in well-draining soil; provide full sun to partial shade.
Hardiness zone
5-9 USDA
Life cycleMountain Ash, commonly referred to as Sorbus scalaris, begins life as a seed, often spread by birds who eat the berries and then disperse the seeds. Once germinated, the seedling grows into a small sapling, establishing a root system and developing foliage. As it matures, the tree progresses through a juvenile phase, characterized by rapid growth and the beginning of structural branching. Upon reaching maturity, the Mountain Ash produces clusters of white flowers, typically in spring, which are pollinated by insects, leading to the development of characteristic red or orange berries. These berries are crucial for seed dispersal, thus ensuring the continuation of the species. As the tree ages, it enters a phase of senescence where growth slows and the tree eventually dies, completing the life cycle.
PropogationPropogation time
Spring-Early Summer
Sorbus scalaris, commonly known as the Korean Mountain Ash, is typically propagated through seeds. The most popular method involves collecting ripe berries in the fall and extracting the seeds. These seeds often require a period of cold stratification to break dormancy, which involves mixing the seeds with slightly moist sand or peat moss and refrigerating them at about 33-39 degrees Fahrenheit (0.5-4 degrees Celsius) for approximately 90 to 120 days. After stratification, sow the seeds in a well-drained seed starting mix, covering them lightly with soil. Place the containers in a location with indirect light and keep the soil consistently moist but not waterlogged. Germination can take several weeks or even a few months, and once the seedlings have grown strong enough, they can be transplanted to their permanent locations.
