European Mountain Ash Sorbus aucuparia var. xanthocarpa
ABOUT
The plant known as rowan or mountain ash displays a distinct appearance characterized by its compound leaves, which are made up of multiple leaflets arranged in a feather-like pattern along a central stem. The leaves are typically bright green and may turn shades of orange, red, or yellow during the fall, showcasing a striking color transformation with the seasons. Adorning the plant are clusters of small, creamy-white flowers that exude a subtly sweet fragrance. These blooms are quite attractive to bees and other pollinators, coming alive with activity during flowering season. Following the flowering period, the rowan bears fruit in the form of small berries. In the variety specified, the berries take on a unique appearance with a yellowish hue, standing out from the more commonly seen red or orange berries of other rowan types. These berries often persist on the branches even through winter, adding a splash of color to the barren landscape and providing a food source for birds. The overall structure of the rowan is elegant, with a branching pattern that gives it a graceful silhouette. Its bark is smooth and a silvery-gray color which can be particularly noticeable in the winter months when the tree is devoid of its foliage. The rowan's aesthetic qualities make it a favored ornamental plant in gardens and parks, appreciated for its year-round beauty and its ability to tolerate a wide range of conditions.
About this plant
- Names
Family
Rosaceae
Synonyms
Yellow-Berried Rowan, Yellow-Fruited Rowan, Yellow Berry Mountain Ash
Common names
Sorbus aucuparia f. xanthocarpa, Pyrus aucuparia var. xanthocarpa
- Toxicity
To humans
Rowan, specifically the variety Sorbus aucuparia var. xanthocarpa, can be toxic to humans if ingested in large quantities. The raw berries contain parasorbic acid, which can convert into hydrocyanic acid (cyanide) in the human body. Symptoms of mild poisoning might include nausea, vomiting, diarrhea, and stomach cramps. Severe poisoning, although rare, can cause dizziness, weakness, excessive perspiration, dilation of the pupils, and increased heartbeat. To reduce toxicity, the berries are usually cooked which breaks down the parasorbic acid.
To pets
Rowan, or Sorbus aucuparia var. xanthocarpa, can also be toxic to pets if parts of the plant, particularly the raw berries, are consumed. The berries contain compounds that can lead to cyanide poisoning, though generally, a pet would need to ingest a large amount to experience severe toxicity. Symptoms of poisoning in pets can resemble those in humans, which may include vomiting, diarrhea, difficulty breathing, lethargy, seizures, and potentially coma. More commonly, pets might experience gastrointestinal upset if they consume rowan berries. If you suspect your pet has ingested a toxic plant, it's important to consult a veterinarian immediately.
- Characteristics
Life cycle
Perennials
Foliage type
Deciduous
Color of leaves
Green
Flower color
White
Height
20 feet (6 meters)
Spread
20 feet (6 meters)
Plant type
Tree
Hardiness zones
3
Native area
Europe
Benefits
- General Benefits
- Wildlife attraction: Bright-colored berries serve as a food source for various birds, particularly through autumn and winter.
- Ornamental value: Vibrant yellow berries and autumn foliage provide visual interest in gardens and parks.
- Erosion control: Deep root systems stabilize soil on slopes and prevent erosion.
- Adaptability: Rowan trees are hardy and can thrive in a range of soil types and climatic conditions.
- Biodiversity support: Acts as a host plant for various insect species, which in turn support local ecosystems.
- Shade provision: Offers shade in landscaped areas, creating cooler microclimates during warmer months.
- Windbreak: When planted in groups, they can act as windbreaks, protecting smaller plants and reducing wind erosion.
- Medical Properties
- Rich in Vitamin C: The berries of Sorbus aucuparia, commonly known as Rowan, are known to contain high levels of Vitamin C.
- Astringent qualities: Traditionally, the fruit might have been used for its astringent properties to treat diarrhea and dysentery.
- Diuretic effects: The berries may have been used for their diuretic effect to help promote urine production and alleviate fluid retention.
- Antioxidant content: The high levels of antioxidants in the berries could help in protecting cells from damage by free radicals.
- Improvement of capillary health: The plant has been thought to have bioflavonoids that might improve the health and integrity of capillaries.
- Air-purifying Qualities
This plant is not specifically known for air purifying qualities.
- Other Uses
- The berries of the Rowan tree can be used to make a natural dye, with the color varying depending on the mordant used during the dyeing process.
- Rowan wood is strong and resilient, making it suitable for crafting small wooden tools such as handles for tools and walking sticks.
- In some cultures, the Rowan tree is believed to harbor protective qualities and is planted near homes to ward off evil spirits.
- The tree's dense foliage can provide habitat and shelter for various bird species, enhancing biodiversity in gardens.
- Rowan berries can be used as a food source for birds in the winter when other food is scarce, helping them survive the cold months.
- The flowers' nectar and pollen attract bees and other pollinators, supporting the local ecosystem's health.
- Rowan wood can be used in turnery to create intricate woodworking pieces, such as bowls and decorative items.
- The tree is sometimes used in urban landscaping for its ornamental qualities, particularly for its vibrant autumn foliage and bright berries.
- Rowan berries can be used in the preparation of homemade wines and liqueurs, offering a unique tart flavor.
- Traditionally, some cultures have used the wood of Rowan to smoke fish and meat, imparting a distinct flavor to the food.
Interesting Facts
- Feng Shui
The Rowan is not used in Feng Shui practice.
- Zodiac Sign Compitability
The Rowan is not used in astrology practice.
- Plant Symbolism
- Protection: The Rowan Tree, which is another name for Sorbus aucuparia, is often associated with protection from enchantment and harmful magic. In folklore, people believed that having a piece of the tree or its red berries in the house would protect against malevolent forces.
- Wisdom: The tree is thought to represent knowledge and wisdom, embodying an essence of learning and understanding, in part due to its longstanding presence in mythology as a tree of life or world tree.
- Courage: Ancient lore sometimes credits the Rowan Tree with the ability to inspire strength and bravery in challenging situations, perhaps because it thrives in harsh conditions and elevations.
- Healing: Traditionally, the berries of the Rowan Tree were used in medicines, which gives the tree a symbolic connection to healing and health.
- Mysticism: With its rich folklore, the Rowan is often seen as a mystical tree, bridging the connection between the earthly world and the spiritual realm.
- Water
The European Rowan, or Sorbus aucuparia var. xanthocarpa, requires moderate watering. It is important to keep the soil consistently moist but not waterlogged. During the growing season, typically water the Rowan tree once a week with about 1.5 to 2 gallons of water, depending on rainfall. Reduce watering in the winter when the tree is dormant but ensure the soil doesn't completely dry out. Overwatering can lead to root rot, so it's crucial to provide good drainage.
- Light
European Rowan trees thrive in full sunlight but can tolerate partial shade. The best spot for planting a Rowan tree would be an area where it receives at least six hours of direct sunlight daily. Avoid overly shaded areas to ensure healthy growth and abundant fruiting.
- Temperature
The ideal temperature range for a European Rowan is between 50°F and 70°F but it can withstand temperatures as low as -4°F in winter and up to 86°F in summer. These trees are cold-hardy and can tolerate frost well, making them suitable for many temperate climates. Avoid exposure to extreme heat for prolonged periods.
- Pruning
Prune European Rowan trees to remove dead or damaged branches and to shape the tree in late winter or early spring before new growth starts. Thinning out overcrowded branches every few years encourages better air circulation and light penetration, which is beneficial for the tree's health. Pruning is usually done annually or as necessary to maintain the tree's structure.
- Cleaning
As needed
- Soil
The best soil mix for the European Mountain Ash (Rowanberry or Rowan) should be well-draining with a slight acidity to neutral pH (pH 5.5 to 7.0). A blend of loam, peat, and coarse sand or perlite is recommended to ensure good drainage and aeration.
- Repotting
Rowan trees, including the European Mountain Ash, are not commonly repotted as they are typically grown outdoors. When young, they can be repotted every 2-3 years, but mature trees should be planted in the ground where they can grow without the need for repotting.
- Humidity & Misting
European Mountain Ash is adaptable and does not require high humidity; it thrives in average outdoor humidity levels. Providing a natural environment with seasonal changes is often sufficient for this hardy tree.
- Suitable locations
Indoor
Difficult indoors, need bright light, seasonal chills.
Outdoor
Full sun, sheltered location, protect from strong winds.
Hardiness zone
3-7 USDA
- Life cycle
The Rowan tree, specifically Sorbus aucuparia var. xanthocarpa, begins its life cycle with seed germination, which is influenced by cold stratification, thus typically occurring in the spring following dispersal. Seedlings emerge and establish themselves, generally in well-drained soils, progressing through a juvenile phase characterized by rapid growth. As the tree matures, it enters the vegetative stage, where it develops a strong root system and extensive foliage, transitioning over several years to its reproductive phase. Flowering typically occurs in spring, with the tree producing clusters of hermaphrodite flowers that are pollinated by insects. Following pollination, the tree bears bright-colored berries by late summer or autumn, which are attractive to birds that aid in seed dispersal. The tree's longevity allows it to go through multiple flowering and fruiting cycles, reaching maturity between 10-20 years, and living for several decades, sometimes up to a century or more.
- Propogation
Propogation time
Early Spring
The most popular method of propagation for the Sorbus aucuparia var. xanthocarpa, commonly known as the Yellow-berried Rowan tree, is through seed sowing. The best time to sow Rowan tree seeds is in the fall, immediately after the berries have ripened and have been collected. The seeds contain naturally occurring germination inhibitors, which can be overcome by a process of cold stratification, simulating winter conditions. To accomplish this, the seeds should be mixed with a moist substrate like sand or peat moss and then stored in a refrigerator for approximately 18 weeks. After stratification, seeds can be sown in a well-draining seed starting mix, covered lightly with soil, and kept at a constant moisture level. Germination may be slow and irregular, often taking several months, but with patience, young saplings will emerge that can eventually be transplanted to their permanent growing location.