What to do if petunia leaves turn yellow

1. Apply fertilizer appropriately:

Reason: When too much fertilizer is applied, the new leaves will become thicker and yellower. If it is not fertilized for a long time, it will lack nutrients and cause the leaves to turn yellow.

Solution: If the amount of fertilizer is large, you should stop fertilizing immediately, and then increase the amount of watering to allow the fertilizer in the soil to flow away, or you can directly change the soil in the pot. Apply fertilizer in moderation. If it has not been fertilized for a long time, then give it some fertilizer.

2. Increase lighting:

Reason: If petunias are placed in a cool or dimly lit place for a long time, their branches and leaves will easily turn yellow.

Solution: Place it in a well-ventilated and sunny location, away from direct sunlight and in too much shade.

3. Increase humidity:

Reason: When the indoor environment is dry, its leaves will turn yellow and become burnt.

Solution: You can spray water or cover it with a layer of plastic film to adjust the humidity in the air.

4. Adjust the room temperature:

Reason: The room temperature will be very high in summer, and the roots cannot absorb water and nutrients normally, which will cause the leaves to turn yellow. In winter, the room temperature will be very low, and the leaves may be frostbitten and turn yellow.

Solution: In summer, you can place it in a ventilated and cool place. In winter, you can take some warming measures. You should adjust the indoor temperature in time and it should not be too high or too low.