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Cold Damage on anthurium

anthurium with cold damage

What's Happening

Anthuriums are strictly tropical (USDA zones 10-12) with optimal range of 65-80°F. When temperatures drop below 55°F, cellular metabolism slows dramatically. At 45-50°F, cell membranes lose fluidity causing chilling injury—water-soaked lesions on leaves that later turn brown. Cold damage often occurs during winter shipping, near drafty windows, or when placed near air conditioning vents. Unlike sunburn (crispy brown), cold damage is soft and wet initially.

How to Fix It

  1. 1

    Immediate warming: Move to stable 70°F+ location away from drafts

  2. 2

    Assess damage extent: Water-soaked or translucent patches = chilling injury

  3. 3

    Remove severely damaged tissue: Trim soft/brown leaves with sterile scissors

  4. 4

    Do NOT water: Cold-damaged roots cannot absorb water—overwatering causes rot

  5. 5

    Wait for recovery: New growth indicates successful recovery; may take 4-6 weeks

  6. 6

    Consider heat mat: Place pot on heating mat set to 75°F to accelerate root metabolism

  7. 7

    Monitor closely: Watch for secondary fungal infections on damaged tissue

How to Prevent It

Maintain 65-80°F year-round; never place near exterior doors or drafty windows in winter; avoid air conditioning vents in summer; use heat mats (set to 75°F) for winter growing; insulate pots with terracotta or place on foam board if near cold surfaces; delay winter shipping purchases to spring.

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Frequently Asked Questions

What causes cold damage on my plant?
Anthuriums are strictly tropical (USDA zones 10-12) with optimal range of 65-80°F. When temperatures drop below 55°F, cellular metabolism slows dramatically. At 45-50°F, cell membranes lose fluidity c...
How do I fix cold damage?
Immediate warming: Move to stable 70°F+ location away from drafts. Assess damage extent: Water-soaked or translucent patches = chilling injury.
How do I prevent cold damage from happening again?
Maintain 65-80°F year-round; never place near exterior doors or drafty windows in winter; avoid air conditioning vents in summer; use heat mats (set to 75°F) for winter growing; insulate pots with ter...