![]() Placing mulch around the base of the shrub will help to conserve moisture as it rains or snows. During the winter, viburnums are not active growers so the evaporation of water is slower and the plant needs much less water. ![]() To prepare for colder weather, it is best to stop watering the shrub in the fall. This can damage new growth that is on the way. Do not prune at all when frost is on the way. Evergreen varieties should be pruned in late winter or early spring. For deciduous varieties, pruning is done after flowering. Maintenance pruning of dead or damaged branches can be done anytime during the growing season. Introduced by the Canadian Ornamental Plant Foundation.Pruning viburnums is not necessary unless you are looking to shape the plant or control its growth. Fruits, a few flowers and autumn foliage color may all be simultaneously present on shrubs in early fall. 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. Leaves, flowers and fruits are typically smaller than those found on typical f. ‘Summer Snowflake’ is an upright cultivar that matures to 5-8’ tall (infrequently taller). Specific epithet means pleated or folded in reference to leaf veins. Genus name comes from the Latin name of a species plant. tomentosum) is native to forests and thickets in China and Japan.įorma tomentosum has fine hairs on young stems and leaf undersides. tomentosum) was named as if it were a variety of the species. As a result of this inverted schedule of discovery, the sterile form was mistakenly given a species name ( Viburnum plicatum) and the subsequently discovered fertile form (f. tomentosum) from which it was actually developed. ![]() It was discovered prior in time to the discovery of the wild fertile doublefile form (f. plicatum) is known from cultivation only (first observed as a garden plant in Japan). Except as to flower structure, bloom time, height and branching habit, both forms are otherwise very similar and commonly sold in commerce under a number of different cultivar names. tomentosum typically will not exceed 10’ tall. plicatum may rise to as much as 15’ tall, but mature height of f. plicatum typically occurs about two weeks later than that of f. tomentosum) which is the wild-related taxon featuring fertile, flat-topped flower clusters (2-4” diameter cymes) which bloom along tiered horizontal branches in doublefile form, each cluster containing an outer ring of large showy sterile florets surrounding a center mass of tiny non-showy fertile florets which when fertilized give way to egg-shaped fruits and viable seed. ![]() plicatum) which is the type form featuring sterile, snowball-like, orbicular inflorescences (2-3” diameter cymes) of non-fragrant, showy white flowers along the branches in spring with no subsequent fruit and (2) doublefile viburnum (f. Two different forms of this shrub are commonly sold in commerce: (1) Japanese snowball bush (f. Leaves turn burgundy red to purplish red in fall. Ovate, toothed, strongly-veined, dark green leaves (to 4” long) have pleated upper surfaces. Viburnum plicatum is a dense, upright, multi-stemmed, deciduous shrub that typically matures to 8-15’ tall with a slightly larger spread.
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