Leaf Drop on Mature Photinia 'Red Robin' – Salt Damage Suspected

Diagnosing Decline in an Established Red Robin

A 10-year-old Photinia dropping leaves despite healthy-looking new red growth may be suffering from delayed saltwater flood damage (past 2–3 years). Root injury from saline water manifests slowly, stressing the plant over time.

Remediation

Apply a balanced fertilizer to support root regeneration and overall vigor. Monitor for improvement; if decline continues, replacement with a salt-tolerant species may be necessary.