What if the leaves of Petunia turn yellow?

1. Appropriate amount of fertilization:

Reason: when the amount of fertilizer is too large, the new leaves will be thicker and yellowed. If it is not fertilized for a long time, it will lack nutrients and cause the leaves to turn yellow.

Solution: if you apply a large amount of fertilizer, you should stop applying fertilizer immediately, and then increase the amount of water, so that the fertilizer in the soil can be lost, or you can change the soil directly. It is necessary to apply a proper amount of fertilizer, and if there is no fertilizer for a long time, give it some fertilizer.

2. Increase the illumination:

Reason: if you put the petunia in a cool or weak light place for a long time, the branches and leaves will easily turn yellow.

The reason for the solution: put it in a well-ventilated and sunny position, not in the sun nor in the shade.

3. Increase humidity:

Reason: when the room is in a dry state, its leaves will turn yellow and scorch.

The reason for the solution: you can spray water or cover a layer of plastic film to adjust the humidity in the air.

4. Adjust room temperature:

The reason: the room temperature will be very high in summer, the roots can not absorb water and nutrients normally, which will cause the leaves to turn yellow, while the winter room temperature will be very low, and the leaves may get frostbite and cause the leaves to turn yellow.

The reason for the solution: it can be put in a cool and ventilated position in summer, some warm measures can be taken in winter, and the indoor temperature should be adjusted in time, not too high or too low.