Redtip Photinia One-Sided Browning: Stem Injury or Decay

Redtip tree brown on one side. Sudden or gradual?

Diagnosis

Sudden: Physical injury to main stem on that side (check bark at base of large branches/trunk).
Gradual: Progressive stem decay disease.

Prune dead wood if limited. If severe, replace. Avoid mower/trimmer damage.

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