Clusters of snowball flowers smother the stems of Viburnum opulus in May and June, giving way to glossy, red berries in autumn. Viburnum flowers are loved by florists for their green-tinged blooms that mature to brilliant white. This reliable, bushy deciduous shrub is cloaked in vibrant green, maple-like foliage throughout summer before autumn turns its leaves to shades of purple and red. An excellent choice for encouraging wildlife, the Snowball Bush makes a superb specimen shrub for a long season of interest, even in challenging coastal areas.w.