Easily grown in average, medium, well-drained soil in full sun to part shade. Prefers moist loams, but tolerates wide range of soils and has good drought tolerance. Prune as needed immediately after flowering. For best cross-pollination and resulting fruit display, plant shrubs in groups rather than as single specimens.
Viburnum plicatum f. tomentosum, commonly called doublefile viburnum, is a dense, multi-stemmed, deciduous shrub with distinctively tiered horizontal branching that typically matures over time in a broad-rounded form to 8-10’ tall with a slightly larger spread. It is native to forests and thickets in China and Japan. Flowers bloom in late April-May in flat-topped, lacecap-like clusters (each to 2-4” but less frequently to 6” wide) which extend along the branches and above the foliage in double rows, hence the common name of doublefile viburnum. Each cluster has an outer ring of large, showy, snow-white, sterile florets (each to 1-2” across) surrounding a central mass of tiny non-showy fertile florets which when fertilized give way to egg-shaped 1/3” long fruits (red maturing to black) and viable seed. Ovate, toothed, strongly-veined, dark green leaves (to 4" long) turn burgundy red to purplish red in fall. A large number of cultivars have been introduced into commerce.
From Latin, viburnum is the name of a species plant, plicatum means pleated or folded in reference to leaf veins, and tomentosum means woolly in reference to fine hairs on young stems and leaf undersides.
‘Summer Snowflake’ is an upright cultivar that matures to 5-8’ tall (infrequently taller). Leaves, flowers and fruits are typically smaller than those found on typical f. tomentosum plants. White lacecap-like flowers bloom in spring (late April-May), but continue to bloom sporadically through summer (hence the cultivar name) and sometimes into early fall. Fruits, a few flowers and autumn foliage color may all be simultaneously present on shrubs in early fall. Introduced by the Canadian Ornamental Plant Foundation.
No serious insect or disease problems.
Specimen or groups. Shrub borders, foundations or hedges.