Viburnum plicatum f. tomentosum (Doublefile Viburnum)

Doublefile Viburnum is a striking deciduous shrub prized for its beautiful horizontal branching pattern, white lacecap flowers, and intricate foliage. The branches grow in layers, which give it a distinctively tiered, “double-file” appearance.

Viburnum plicatum f. tomentosum: An In-depth Look

Native: This particular form of Viburnum plicatum is native to Japan and China.

Plant Type and Habit: It is a deciduous shrub that grows in a broad, horizontal, multi-stemmed habit. Its tiered structure gives it architectural interest, making it stand out in the landscape.

Size: Doublefile Viburnum typically grows to a height of 8 to 10 feet (2.4 to 3 meters) and spread of 8 to 12 feet (3 to 3.6 meters), making it quite a substantial shrub when mature.

Flowers: The shrub produces clusters, 2-4 inches (5-10 cm) across, of small white flowers in a lacecap pattern, often compared to hydrangeas flowers. The outer ring of flowers is sterile and showy, while the inner flowers are small and fertile. Doublefile Viburnum usually blooms in mid to late spring, depending on geographic location.

Fruits: After flowering, the plant develops small, red berries that mature into black, adding interest in late summer and fall.

Foliage: The leaves are heart-shaped, toothed, deeply veined, growing in opposite pairs along the branches. They are dark green in the summer and can turn to attractive shades of red and purple in the fall.

Hardiness: Generally hardy in USDA zones 5-8, it is a versatile plant that can tolerate a range of climatic conditions.

Uses: Given its size and unique structure, it’s often used as a specimen plant but can also be effective in mass plantings or as part of a hedge. Its architectural form makes it ideal for Asian-themed gardens and contemporary landscapes.

Wildlife: The flowers attract a variety of pollinators, including bees and butterflies, while the berries are a food source for birds.

Deer and Rabbits: The shrub has moderate deer resistance, which means it may escape browsing in areas with low deer pressure. Rabbits generally avoid it.

Toxicity: The berries are mildly toxic to humans if ingested but are generally not harmful to pets or other wildlife.

Drought: Once established, the shrub has moderate drought tolerance but prefers consistently moist soil for best performance.

Invasiveness: Find where this species is invasive in the United States. Discover beautiful U.S. native plant alternatives.

Benefits: The shrub offers aesthetic appeal, with its unique branching structure adding architectural interest. The flowers and berries attract wildlife, enhancing the garden’s ecosystem. It also offers seasonal interest, from spring flowers to fall foliage.

Key Facts: One of the standout features is its layered, horizontal branching, often cited for its “double-file” arrangement of leaves and flowers. This unique characteristic adds multi-dimensional depth to gardens and landscapes. Additionally, it can thrive in a variety of soil types and conditions, making it a robust and versatile choice.

How to Grow and Care for Doublefile Viburnum

Light: Prefers full sun to partial shade. Ensure it receives at least 6 hours of sunlight for optimal flowering and foliage color.

Soil: Adaptable to a wide range of soil types but prefers fertile, humus-rich, well-drained, loamy to sandy soil. Slightly acidic to neutral pH is ideal.

Water: Moderate water requirements. Water deeply once a week, especially during dry spells. Overwatering or poor drainage can lead to root rot.

Fertilizer: Apply a balanced, slow-release fertilizer in early spring. Over-fertilizing can lead to excessive growth but fewer flowers.

Pruning: Best pruned immediately after flowering to maintain shape and remove any dead or damaged branches. Avoid heavy pruning, as it may reduce next year’s blooms.

Propagation: Propagate through softwood cuttings in early summer.

Pests and Diseases: No serious insect or disease issues. Keep an eye out for aphids, scale insects, thrips, or viburnum beetle. Occasional disease problems include leaf spot, root rot, and botrytis. Apply appropriate treatments as needed.

By following these care guidelines, you can ensure that your Viburnum plicatum f. tomentosum thrives, offering seasonal interest and aesthetic appeal to your garden.