Brown spots on African violet leaves can be caused by several factors. Here are some common causes and solutions:
- Overwatering:
- Symptoms: Brown spots, especially on the lower leaves.
- Solution: Allow the soil to dry out slightly between waterings. Ensure the pot has good drainage.
- Underwatering:
- Symptoms: Dry, crispy brown spots, often on the edges of leaves.
- Solution: Water your African violet regularly, ensuring the soil is consistently moist but not soggy.
- Low Humidity:
- Symptoms: Brown, crispy leaf edges.
- Solution: Increase humidity by misting the plant regularly, using a humidifier, or placing the pot on a tray of pebbles filled with water.
- Nutrient Deficiency or Toxicity:
- Symptoms: Brown spots, yellowing leaves, or stunted growth.
- Solution: Fertilize your African violet with a balanced, water-soluble fertilizer diluted to half strength. Avoid overfertilizing.
- Pests and Diseases:
- Symptoms: Brown spots, distorted leaves, or visible pests like aphids or mealybugs.
- Solution: Inspect your plant regularly for pests. Use insecticidal soap or neem oil to treat infestations. For fungal diseases, use a fungicide.
- Sunburn:
- Symptoms: Large, brown, leathery spots on the leaves.
- Solution: Move your African violet to a location with bright, indirect light. Avoid direct sunlight.
Additional Tips:
- Use lukewarm water: Cold water can shock the plant.
- Avoid getting water on the leaves: Water the soil directly to prevent leaf spot diseases.
- Provide adequate light: African violets thrive in bright, indirect light.
- Repot regularly: Repot your African violet every 1-2 years to provide fresh, nutrient-rich soil.
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