Reasons why rhododendron leaves turn black and dry

1. Insufficient humidity

Rhododendrons prefer a high humidity environment. If the humidity does not meet the requirement in an environment with relatively low air humidity, the leaves will turn black and dry. At this time, you need to spray the plants with more water. As long as the air humidity is appropriately increased, this phenomenon will be solved.

2. The sun is too strong

It will grow more vigorously under bright light, but it will have a hard time adapting to strong summer light. The leaves are also very fragile at this time, and will become dry and black after being sunburned. Care should be taken to block out strong light, especially at noon in midsummer.

3. Poor ventilation

The ventilation of the maintenance environment is relatively poor, especially when it is grown indoors. If the windows are not opened frequently, it will not only easily attract pests and diseases, but also cause poor leaf growth. Especially in summer, if kept in a closed and stuffy place, the leaves will easily dry and turn black. You should open windows more often or move indoors more often to allow air circulation.

4. Infection

If the plant is infected with pathogens during the cultivation period, adverse symptoms will appear on the leaves, such as blackening and drying. Therefore, it is necessary to deal with the germs in a timely manner and insist on spraying drugs for prevention and control.