When to prune butterfly bush (Buddleja)
Early spring as new growth starts. Blooms on new wood; cut back hard in early spring. Waiting until buds show tells you where the live wood is in cold zones.
| Type | shrub |
|---|---|
| Blooms on | new wood |
| Bloom season | summer-fall |
| When to prune | Early spring as new growth starts |
| Stop | No heavy pruning in the 6–8 weeks before your first fall frost |
Avoid
Fall cutting in cold zones (stems help winter survival).
Also
Check local invasive status; sterile cultivars exist.
Example dates
| Place | Dates |
|---|---|
| Austin, TX (78701) | Feb 24–Mar 24 |
| Atlanta, GA (30303) | Mar 10–Apr 7 |
| St. Louis, MO (63101) | Mar 18–Apr 15 |
| Chicago, IL (60614) | Mar 27–Apr 24 |
| Denver, CO (80202) | Apr 16–May 14 |
| Seattle, WA (98101) | Feb 27–Mar 27 |
Every ZIP page has its own dates. Find your ZIP.
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Sources
- Colorado State University Extension: Pruning Flowering Shrubs
- Clemson Cooperative Extension HGIC: Pruning Shrubs
Summarized in our own words from public extension publications.
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