Pruning Snowball Viburnum for Maximum Blooms

When and how should I prune my snowball viburnum (Viburnum opulus 'Roseum') to ensure the best spring flowers? Does it bloom on new wood?

Blooms on Old Wood

Snowball viburnum sets flower buds in summer/fall for the following spring. Pruning at the wrong time removes next year's flowers.

Minimal Pruning Needed

• Deadhead spent blooms as they fade.
• After flowering: Remove only dead, diseased, or crossing/rubbing branches.
• Never shear—it ruins the natural form and reduces blooms.

If It's Too Large

Consider transplanting in early spring or fall rather than hard pruning, which can delay flowering for 1–2 years.

With this light-touch approach, your viburnum will deliver spectacular snowball clusters annually.