Crape Myrtle Bark Blackening and Splitting: Winter Kill in Marginal Zones

Diagnosing Multi-Trunk Death

Black bark, splits, no green under bark on multiple crape myrtles after harsh winter = winter kill. Many varieties are only hardy to Zone 7 (Maryland). Northern locations + wind exposure = cambium death.

Key Factors

• Variety hardiness—some die back every hard winter.
• Site exposure—open, windy sites worsen damage.
• Pruning timing—fall pruning stimulates tender growth.

Action Plan

• Scratch each trunk—prune to green wood.
• If all trunks dead to ground, cut to base—may resprout from roots.
• Relocate or replace with hardy cultivars (e.g., 'Natchez', 'Tuscarora' in protected site).

Not a Disease

No pathogen—just climate mismatch. Don't spray; focus on site and variety selection.