1、 How to maintain

1. Basin soil: if you want to better cultivate Rhododendron, you need to use acid soil with good ventilation. If alkaline soil is used for breeding, it will be harmful to its growth and flowering. Flowerpots should also be larger, and the best material is clay pots or ceramic pots

2. Watering: it is a plant that is afraid of drought and waterlogging. During the maintenance period, the soil should be kept moist, but there should be no ponding. In addition to normal watering in summer, it is also necessary to spray water on the leaves to moisturize them. It's better to use rainwater when watering. You can also use tap water for a day or two

3. Sunshine: during the growth period, it should be placed in the sunny place. It cannot be exposed to strong sunlight. If it is exposed to the sun, the leaves will be burned. Summer should be shady and ensure good ventilation

4. Fertilizing: fertilizing Rhododendron should be applied with thin fertilizer frequently instead of thick fertilizer. Thin fertilizer is generally applied once every 10 days in the growing season. It doesn't need to be fertilized in winter, but proper fertilization in January is very beneficial to its spring flowering

2、 Causes of leaf blackening

During the normal maintenance of Rhododendron, long-term water shortage or excessive watering will lead to blackening of leaves. It is necessary to water correctly and maintain the state of soil moisture. This situation will also occur if there is excessive fertilization. Apply a small amount of fertilizer. In addition, the leaves are easy to blacken due to the pollution of diseases. Chemicals should be used as soon as possible