Should You Cut Back Knock Out Roses in Fall in Michigan?

Fall Pruning of Knock Out Roses in Zone 5

You’re in Michigan (frozen north) and wonder about fall pruning. Most wood dies back anyway; you trim dead wood in spring.

Recommendation

• Do not prune hard in fall. It stimulates tender growth that winter kills.
• Leave canes intact for winter insulation and snow capture.
• Spring pruning (April): Remove all dead wood, shape to 12–18″.

Exception

• Only trim long canes that could whip in winter winds (cut back by ¼).
• If plants have never been pruned and are huge, consult a local rosarian for gradual renovation.

Your current spring-only approach is correct for Zone 5.