How to prune blackhaw viburnum

Late winter to early spring (before growth), or immediately after flowering. Use loppers or a pruning saw to cut out dead, crowded, or crossing branches back to a healthy lateral or ground level. Thin the interior by removing the oldest stems to encourage fresh growth and maintain an open, layered habit.

As needed; every 2-3 years for light thinning; avoid annual shearing. Blackhaw Viburnum (Viburnum prunifolium) is a large, multi-stemmed native shrub or small tree that needs little pruning. Prune in late winter to early spring before growth begins, or immediately after its white flowers fade in spring. Remove dead, crossing, or rubbing stems. Avoid heavy shearing — it destroys the natural layered form and removes flower buds.

Use loppers or a pruning saw to cut out dead, crowded, or crossing branches back to a healthy lateral or ground level. Thin the interior by removing the oldest stems to encourage fresh growth and maintain an open, layered habit.