GUARDIAN™ blackhaw viburnum features a more upright habit than the species at 16' high with a spread of 8'. One of the larger viburnums, this cultivar can be treated as a small tree or shrub. Its white flowers in May are followed by pink fruits that turns blue-black and are beloved by birds. Fall color is reddish purple.

Viburnums are a versatile genus of multi-stemmed shrubs that are well suited to the home landscape due to their range of sizes and cultural adaptability. Some viburnums are noted for their fragrant flowers; most bear small fruit that may add visual interest. Many viburnums have attractive fall color. There are over 100 different varieties of viburnum at the Chicago Botanic Garden.