Robellini Palm Brown Shoots: Wind, Humidity, or Lethal Disease?

Two double Robellini palms near pool in Largo, FL: thin, pale, new shoots 25–50% brown/dead. Fed palm food. Owner wants thicker, greener growth.

Possible Causes

• Wind drying: Move to sheltered spot if potted.
• Low humidity: Mist daily; use pebble tray with water (pot not sitting in water).
• Nutrition: Use palm-specific fertilizer as directed, especially summer.

Serious Concern: Lethal Phytoplasma Disease

FL Dept. of Ag reports new fatal phytoplasma killing sabal, Canary Island date, queen palms. Spread by plant-hoppers. No cure. Symptoms: browning, death. DNA test needed. Antibiotic (TreeSaver) injections by arborist 3–4×/year may help but not large-scale solution.

Action

• Disinfect pruners between palms.
• Consult arborist for antibiotic injection.
• Don't remove yet; monitor.

Rule out cultural issues first; disease is emerging threat.