Leaves turning yellow is typically caused by disruptions in chlorophyll production, which can happen due to several reasons:
- Watering issues: Both overwatering and underwatering are common causes. Overwatering suffocates roots and prevents nutrient uptake, while underwatering deprives the plant of moisture leading to yellowing older leaves.
- Nutrient deficiencies: Lack of nitrogen, potassium, magnesium, iron, or sulfur impacts chlorophyll and causes different yellowing patterns on leaves.
- Light problems: Too much intense sunlight can damage leaves and reduce chlorophyll, while insufficient light causes leaves to lose green color.
- Temperature stress: Exposure to extreme heat or cold disrupts nutrient absorption and chlorophyll production.
- Pests and diseases: Insects and pathogens can sap nutrients or damage leaf tissues resulting in yellowing.
To diagnose, check soil moisture, light exposure, temperature, and inspect for pests. The pattern of yellowing (older leaves vs. new leaves, uniform or patchy) offers clues to the cause. Adjust watering, improve nutrient supply, optimize light, control pests, and modify temperature environment accordingly to fix yellow leaves.
