Why are the leaves of Catharanthus roseus turning yellow?

1. Proper watering

Reason: The yellowing of Catharanthus roseus leaves may be due to insufficient or excessive watering. Excessive watering will cause root rot and yellowing of new leaves. Underwatering will cause the leaves to turn yellow due to lack of water, or too few leaves will cause a reduction in the number of roots.

Solution: Control watering and pay attention to drainage during the rainy season. Water thoroughly after the soil in the pot is completely dry.

2. Appropriate lighting

Cause: The yellowing of Catharanthus roseus leaves may also be caused by overexposure to the sun. In summer, when the sun is strong at noon, it shines directly on the plant, causing the leaves to turn yellow.

Solution: Avoid direct sunlight, provide shade in time, and spray water on the leaves to lower the temperature.

3. Suitable temperature

Reason: The temperature is not suitable. If the temperature is too low, below 5 degrees, frost damage is likely to occur, which will also cause the leaves to turn yellow.

Solution: Move the plants indoors in time for winter and control the temperature.

4. Appropriate Fertilization

Regarding fertilization, using too much fertilizer will burn the seedlings, and lack of fertilizer will cause the leaves to turn yellow.

Solution: When applying fertilizer, you can use liquid fertilizer and compound fertilizer alternately, and do not apply fertilizer randomly. If too much fertilizer is applied, water should be applied in time the next day to dilute the fertilizer.