Top 5 Problems When Overwintering Caladiums and How to Fix Them

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Caladiums are beautiful, colorful plants that add vibrant foliage to gardens and indoor spaces. However, overwintering these tropical plants can present several challenges. Understanding common problems and their solutions can help ensure your caladiums survive the colder months and thrive year after year.

1. Fungal Diseases

Fungal infections such as leaf spot and root rot are common issues during overwintering, especially in humid conditions. These diseases can cause yellowing leaves, spots, or rotting bulbs.

How to Fix

  • Ensure proper drainage in pots and soil to prevent excess moisture.
  • Allow bulbs to dry completely before storing.
  • Use fungicides if infection is detected and remove affected foliage promptly.

2. Incorrect Storage Conditions

Storing caladium bulbs in environments that are too cold, too hot, or too humid can damage them and reduce their viability for the next season.

How to Fix

  • Store bulbs in a cool, dry, and well-ventilated area, ideally between 50-60°F (10-15°C).
  • Avoid areas with direct sunlight or temperature fluctuations.
  • Use mesh bags or paper bags for storage, avoiding plastic which traps moisture.

3. Pests

During overwintering, pests such as fungus gnats, mealybugs, and spider mites can infest stored bulbs or foliage, causing damage and weakening the plant.

How to Fix

  • Inspect bulbs and foliage regularly for signs of pests.
  • Remove and discard infested parts promptly.
  • Use insecticidal soap or neem oil as a treatment if pests are detected.

4. Improper Watering

Overwatering can lead to bulb rot, while underwatering can cause bulbs to dry out and become dormant or die.

How to Fix

  • Water sparingly during dormancy, just enough to prevent the bulbs from drying out.
  • Allow soil or storage medium to dry out slightly between watering.
  • Ensure containers or storage bags have good airflow to prevent excess moisture buildup.

5. Lack of Light and Air Circulation

Insufficient light and poor air circulation can lead to mold growth and weaken the bulbs, making them more susceptible to diseases.

How to Fix

  • Store bulbs in a well-ventilated area with low humidity.
  • Periodically check and rotate storage to prevent mold growth.
  • Ensure the storage space receives indirect light to maintain a healthy environment.