Swedish Whitebeam Sorbus 'Birgitta'
ABOUT
Sorbus 'Birgitta', which is commonly known as the Rowan tree or Mountain Ash, is an ornamental tree with a number of distinctive features that contribute to its attractiveness in gardens and landscapes. Its leaves are composed of multiple small, individual leaflets arranged in a feather-like pattern along a central stem, known as pinnate leaves. These leaves are rich green and provide a dense, lush canopy that can create dappled shade underneath. In spring, the Rowan tree produces clusters of delicate white flowers that bloom in dense corymbs, providing a showy, fragrant display that can attract pollinators such as bees. Following the flowering period, the tree is known for its vibrant autumn colors, as the leaves turn various shades of red, orange, and purple, adding a splash of color to any setting. One of the most striking features of 'Birgitta' is its fruit. The tree bears clusters of bright orange or red berries that are quite conspicuous against the foliage. These berries persist into the winter, providing visual interest during the colder months, as well as a valuable food source for birds and other wildlife. The bark of the Rowan tree is smooth and typically silvery-grey, which provides a nice contrast to the rich foliage and colorful berries. The overall shape of the tree is typically well-rounded with a branching habit that gives it a tidy and attractive appearance throughout the year.
About this plant
NamesSynonyms
Swedish Whitebeam, Birgitta Rowan.
Common names
Sorbus 'Birgitta'
ToxicityTo humans
The Sorbus 'Birgitta', commonly referred to as Rowan, is not generally considered toxic to humans. However, the seeds within the berries contain a substance called parasorbic acid which can be toxic if consumed in large quantities. If ingested, the seeds may potentially cause symptoms such as gastrointestinal distress, including vomiting and diarrhea. It is advisable to avoid eating the seeds, and consumption of large quantities of the berries should be done with caution.
To pets
The Rowan is not typically regarded as a toxic plant to pets. However, as with humans, the seeds inside the berries contain compounds that can be harmful if ingested in large amounts. If a pet consumes a significant quantity of seeds, it might experience similar symptoms of poisoning such as vomiting or diarrhea. It is always best to prevent pets from eating large amounts of any non-food plant material to avoid any potential adverse reactions.
CharacteristicsLife cycle
Perennials
Foliage type
Deciduous
Color of leaves
Green
Flower color
White
Height
15 feet (4.57 meters)
Spread
10 feet (3.05 meters)
Plant type
Tree
Hardiness zones
6
Native area
Europe
Benefits
General Benefits- Aesthetic Appeal: Sorbus 'Birgitta', commonly known as rowan or mountain ash, adds visual interest to the landscape with its attractive foliage, flowers, and berries.
- Wildlife Attraction: The berries of the rowan tree attract birds and other wildlife, providing them with a natural food source.
- Seasonal Interest: Sorbus 'Birgitta' offers year-round interest with its changing leaves, spring flowers, autumn berries, and structural form in winter.
- Low Maintenance: Rowan trees are generally low maintenance, requiring minimal pruning and care once established.
- Disease Resistance: Sorbus 'Birgitta' is known for having good resistance to common diseases that affect other Sorbus species.
- Urban Tolerance: The tree has a level of tolerance to urban pollution, making it suitable for city environments.
- Adaptability: Sorbus 'Birgitta' can adapt to a variety of soil types, though it prefers well-drained soils.
Medical PropertiesThis plant is not used for medical purposes.
Air-purifying QualitiesThis plant is not specifically known for air purifying qualities.
Other Uses- Sorbus 'Birgitta', commonly known as mountain ash, can be used in woodworking projects such as decorative turning and fine carving due to its fine-grained wood.
- Dye can be extracted from the fruit of the mountain ash for use in textile coloring, providing hues ranging from green to orange depending on the mordant used.
- The mountain ash's fruit can be utilized as a natural pectin source in homemade jams and jellies, helping to achieve the desired consistency.
- Young stems and twigs of the mountain ash can be crafted into small walking sticks or ornamental canes after proper curing and treatment.
- The tree's abundant nectar-producing flowers are valuable for beekeepers, encouraging pollination and contributing to the production of honey with a unique flavor.
- Wine and liqueur can be produced from the berries of mountain ash, offering a distinct and tart flavor profile unique to the fruit.
- Mountain ash leaves can be incorporated into a compost pile, where they contribute to the nutrient content and structural variety of the compost.
- Dried and powdered mountain ash berries have been used as a natural flavoring spice, adding a fruity zest to various culinary dishes.
- The tree itself can serve as a shelter and nesting site for birds, adding ecological value and supporting local wildlife in garden settings.
- Mountain ash wood can be used for the creation of musical instruments such as recorders and whistles, taking advantage of its acoustic properties.
Interesting Facts
Feng ShuiThe plant Rowan is not used in Feng Shui practice.
Zodiac Sign CompitabilityThe plant Rowan is not used in astrology practice.
Plant Symbolism- Protection: The Rowan tree, which Sorbus 'Birgitta' is a cultivar of, has often been associated with protection. It is believed to ward off evil and is commonly planted near homes for this purpose.
- Wisdom: In some folklore, the Rowan is seen as a tree of wisdom, symbolizing the knowledge and strength to live life well and with purpose.
- Courage: The hardiness and resilience of the tree signify courage and the ability to face challenges with bravery.
- Magic: Legend has it that Rowan trees have a connection to the magical world, offering a gateway to enchantment and mystical energies.
- Healing: Some cultures believe the tree has healing properties and represents the healing of both the physical and spiritual self.
WaterRowan trees, including the Sorbus 'Birgitta', should be watered deeply once a week, providing about 1.5 to 2 gallons of water per session during the growing season. During the dormant season in winter, reduce watering to bi-weekly or even less, depending on weather conditions. It is essential to avoid waterlogging, so ensure the soil is well-drained. Drought-tolerant once established, Sorbus 'Birgitta' requires less frequent watering, only necessitating supplemental water during extended dry spells.
LightRowan trees like Sorbus 'Birgitta' thrive best in full sun to partial shade. Choose a location that receives at least six hours of direct sunlight daily. They can tolerate some light afternoon shade, particularly in hotter climates, but full sun is ideal for vigorous growth and the best display of flowers and fruit.
TemperatureRowan trees, such as Sorbus 'Birgitta', are cold-hardy and can tolerate temperatures down to -20°F. They grow well in a range of climates but prefer temperate conditions. The ideal temperature range for optimal growth is between 50°F and 70°F. Extreme heat above 90°F can be detrimental to the tree, although it is relatively adaptable to varying conditions.
PruningPruning the Rowan tree, like Sorbus 'Birgitta', helps maintain its shape and remove dead or diseased wood. It should be done in late winter or early spring before new growth starts. Prune sparingly to shape the tree and remove any crossing or rubbing branches; excessive pruning is not necessary. The best time for pruning is often in March, right before the spring growth begins.
CleaningAs needed
SoilRowan 'Birgitta' requires well-drained, fertile soil with a pH range of 5.5 to 7.0. The best soil mix would be a blend of loamy garden soil, peat, and sand to ensure adequate drainage and fertility. Amend with organic matter to enrich the soil nutrients if necessary.
RepottingRowan 'Birgitta' trees planted in containers should be repotted every 3 to 5 years, or when they outgrow their current pot. They are typically not repotted frequently as they are often planted directly in the ground.
Humidity & MistingRowan 'Birgitta' is tolerant of most humidity levels and thrives best in outdoor conditions where humidity is naturally regulated.
Suitable locationsIndoor
Ensure bright light, moderate water, and cool room.
Outdoor
Plant in full sun to partial shade, in well-drained soil.
Hardiness zone
4-7 USDA
Life cycleSorbus 'Birgitta', commonly known as Rowan or Mountain Ash, begins its life cycle with seed germination, which requires exposure to cold temperatures during winter to break dormancy. The seeds sprout in spring to form seedlings, which progressively develop into young saplings. As they mature, Rowan trees undergo a period of vegetative growth, characterized by the expansion of the root system and the development of a woody trunk and branches. The Rowan reaches reproductive maturity within a few years and starts to produce clusters of small white flowers, typically in late spring. Following pollination, these flowers develop into bright red berries by late summer or early fall, which are eaten by birds, aiding in seed dispersal. This deciduous tree experiences a period of dormancy in winter when leaves turn vibrant colors and drop, preparing the plant to endure cold temperatures until the next growing season begins.
PropogationPropogation time
Early spring
Propogation: The most popular method for propagating the Sorbus 'Birgitta', commonly known as Rowan or Mountain Ash, is by seed. The best time for seed propagation is in the fall, immediately after the fruit ripens. Seeds should be extracted from the berries and cleaned before being mixed with a moist growing medium. This mixture is then usually placed into a cold frame or stratified in a refrigerator for approximately 90-120 days to break the seed dormancy. Following stratification, the seeds are sown in well-draining soil and lightly covered. They require consistent moisture and should be kept in a spot with bright, indirect light. Germination can be slow and erratic, often taking several months, so patience is necessary with this form of propagation.
