Doublefile Viburnum

Scientific Name: Viburnum plicatum f. tomentosum

Plant Family: Adoxaceae (formerly Caprifoliaceae)

Native Region: Native to China and Japan; widely cultivated in temperate regions globally.

Doublefile Viburnum

Brief Description

A deciduous shrub known for its distinctive horizontal branching pattern and lacecap-like white flowers that line the tops of the branches in two neat rows. The leaves are ovate, deeply veined, and serrated.

Care Instructions

Plant in a location with partial shade to full sun. Needs moist, well-drained soil rich in organic matter. Provide deep watering during dry spells and fertilize in early spring before new growth appears.

Medicinal Value

We do not currently provide medicinal value for plant identifications.

Sunlight

Full sun to partial shade; ideally 4-6 hours of sunlight. In very hot climates, afternoon shade is beneficial.

Watering

Moderate watering needs; requires consistent moisture, especially during the first few growing seasons. Soil should not be allowed to dry out completely, but it is not drought-tolerant.

Soil

Prefers moist, well-draining, slightly acidic to neutral soil (pH 5.5 to 7.0). Tolerates various soil types except for heavy, standing-water clay.

Hardiness Zone

USDA Zones 5 through 8.

Growth Habit

Multi-stemmed deciduous shrub with a broad, rounded habit and strong horizontal branching. Typically reaches 8-10 feet in height and 10-12 feet in spread.

Bloom Season

Flowering occurs in late spring (May to June). The flowers are flat-topped cymes featuring small fertile flowers in the center surrounded by showy, white, sterile flowers on the outer edge.

Toxicity

Generally considered non-toxic to humans and pets, though ingestion of berries in large quantities might cause mild stomach upset.

Propagation

Propagated via softwood cuttings taken in summer or by layering low-hanging branches into the soil.

Common Pests & Issues

Susceptible to the Viburnum Leaf Beetle, which can defoliate the plant. Occasional issues with powdery mildew or leaf spot if air circulation is poor.

Similar Species

Viburnum plicatum 'Popcorn' (has globose 'snowball' clusters rather than flat lacecaps) and Viburnum sieboldii (which has much larger leaves and different flower structure).

Interesting Facts

The name 'Doublefile' refers to the way the flower clusters are arranged in two rows along the horizontal branches, resembling a 'file' of soldiers.

Created At: 2026-04-24T22:43:01.939870