Most palms are subtropical; Portland (zone 8b) snow and prolonged cold likely killed them.
Identify palm type for precise hardiness. But symptoms suggest mortality.
Identifying and Stopping Deer Damage in Your Landscape
Reviving a 'Dead' Knock Out Rose: Scratch Test and Hard Prune
Pine Tree Needle Browning in High Desert: Water Stress or Bark Beetles
Indoor Palms Turning Brown Overnight: Light and Water Issues
Propagating Areca Palms: Division & Affordable Sources
Cat Palm Care: Solving Brown Tips with Humidity, Light, and Repotting
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