Rose of Sharon Trunk Lichens and Bark Split: Not the Primary Problem

Blue-green moss-like growth on trunk = lichens (harmless, indicate decline). Bark split at ground level likely from internal decay, injury, or weather—not lichens.

What Not to Do

• Tree wrap—harbors insects, limited value.
• Tree paint/sealant—often harmful, not recommended.
• Fungicide drench—lichens aren’t fungi.

Best Practice

Leave split open. Monitor for safety. Lichens are a symptom, not cause.