Reviving Globe Arborvitae After Spring Flood Damage

Diagnosing Flood-Damaged Globe Arborvitae

A homeowner reports their mature globe arborvitae showing severe decline after a spring flood: foliage dying at the base, bare twigs, and dying tips. Nearby spruces were diagnosed with fungus, but the symptoms suggest a different root cause.

Expert Assessment: Root Damage from Flooding

Ed Gulliksen identifies this as a root problem rather than fungal disease. Severe flooding—especially involving salt water—causes extensive root damage that manifests gradually in the canopy. The timeline matches: root systems suffocate or suffer toxic exposure during flooding, then the plant declines as it cannot support existing foliage.

Recovery Strategy

• Fertilize to stimulate new growth – Apply a balanced fertilizer to encourage vigorous regrowth from surviving tissue.
• Do not prune for two years – Allow the plant to recover naturally; pruning adds stress and removes potential photosynthetic tissue.
• Monitor soil drainage – Ensure the site drains well to prevent recurring root saturation.

With patience and proper care, these mature specimens can recover their former beauty.