Pint plant of Viburnum opulus Snowball. The round flower clusters on this viburnum shrub bring charm and elegance to any setting. Japanese snowball viburnum flowers in spring and has deeply veined and pleated leaves. Eastern snowball viburnum is another spring bloomer but has trilobed leaves that resemble maple leaves. Grow in full sun to part shade. They prefer well-drained soil with average moisture. Once these bloomers are established, they show some drought tolerance, but providing consistent moisture assures the best flower show. Plants need to be pruned right after blooming to avoid reducing flower bud numbers for the next year?s blossoms. Zones 3 to 8.