Long before hydrangea blooms with its distinctively round floral trusses of abundant small flowers, the snowball bush, Viburunum opulus 'Roseum,' shares its own unique version of similar bloom. Although the cultivar name suggests that the bloom would be pink or red, it is exclusively white. Hydrangea will bloom later, mostly in pink or red, with some in blue or lavender, and a few in white.
The snowball blooms of snowball bush are about thee inches wide, so are smaller than those of hydrangea, and do not last quite as long. They bloom early in spring, without subsequent bloom. The 3- or 3-inch long deciduous leaves might turn surprisingly vivid orange and red before defoliating in autumn. Mature specimens easily get taller than 10 feet, and might reach 15 feet.
Snowball bush eventually develops a relaxed and unrefined style that fits nicely into woodsy landscapes. Autumn foliar color is better with full sun exposure, but a bit of partial shades promotes a slightly more open branch structure that displays the spring bloom better. Pruning should be done after bloom. Snowball bush prefers somewhat regular watering and rich soil, but is not too finicky. -- Tony Tomeo