Alocasia Leaf Spots: Cold Damage from Open Window

Diagnosing Orange-Brown Spots on Alocasia

A year-old alocasia in Chicago develops expanding orange-brown spots on largest leaf edges. Plant sits in east/south window with occasional open-window exposure, protected only by bubble wrap during cold snaps.

Primary Cause: Cold Sensitivity

Alocasias are extremely cold-sensitive. Even brief exposure to cold air from an open window causes cellular damage appearing as marginal leaf spotting. Bubble wrap provides insufficient insulation against radiant cold.

Contributing Factors

• Uneven watering or soil drying excessively
• Roots emerging from drainage holes
• Chicago winter temperatures near windows

Immediate Actions

1. Relocate immediately - Move away from cold windows and drafts
2. Maintain 65°F+ temperatures - No cold drafts whatsoever
3. Remove severely damaged leaves - They won't recover
4. Adjust watering - Keep evenly moist, not wet or bone-dry
5. Increase humidity - Pebble tray or humidifier helps

Long-Term Care

Alocasias need consistent warmth, high humidity, bright indirect light, and well-draining rich soil. They're not windowsill plants in cold climates. Consider a dedicated plant shelf away from windows with supplemental lighting if needed.