White spots on Calathea leaves can be a sign of several issues. Here are some common causes and their solutions:
- Mineral Deposits:
- Cause: Hard water can leave mineral deposits on the leaves.
- Solution: Use distilled or filtered water to water your Calathea. If mineral deposits are already present, gently wipe them off with a soft, damp cloth.
- Spider Mites:
- Cause: These tiny pests can cause white or yellow spots on leaves.
- Solution: Increase humidity around the plant, as spider mites thrive in dry conditions. Use insecticidal soap or neem oil to treat the infestation.
- Fungal Diseases:
- Cause: Overwatering or poor air circulation can lead to fungal diseases like powdery mildew or leaf spot.
- Solution: Reduce watering frequency and improve air circulation around the plant. Treat fungal infections with a fungicide specifically designed for houseplants.
- Nutrient Deficiencies:
- Cause: Deficiencies in essential nutrients, such as magnesium or potassium, can cause white spots.
- Solution: Fertilize your Calathea with a balanced houseplant fertilizer during the growing season.
- Sunburn:
- Cause: Too much direct sunlight can burn the Calathea leaves, causing white or brown spots.
- Solution: Move your Calathea to a location with bright, indirect light.
Additional Tips:
- Regularly inspect your Calathea: This will help you catch problems early.
- Use a humidifier: Calathea plants prefer high humidity.
- Avoid overwatering: Allow the top inch of soil to dry out between waterings.
By addressing the underlying cause, you can help your Calathea recover and prevent future problems.
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