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When to prune spirea, spring-blooming (bridal wreath, Vanhoutte)

Within about 3 weeks after flowers fade. Blooms on old wood; thin right after bloom.

Typeshrub
Blooms onold wood
Bloom seasonspring
When to pruneWithin about 3 weeks after flowers fade
StopNo heavy pruning in the 6–8 weeks before your first fall frost

Avoid

Winter shearing.

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Sources

Summarized in our own words from public extension publications.

All pruning timing