First, the water temperature is relatively low. You should leave the water for a day or two, and then water it when it is close to room temperature. Directly watering the water in the tap water pipe, stimulating its roots, is likely to cause deciduous leaves. Second, if the fertilizer concentration is too high, it will also cause its leaves to fall off. It is suggested to apply thin fertilizer frequently, once every 7 ~ 10 day or once every half month. Don't apply too thick fertilizer, which may also cause defoliation. Don't fertilize azaleas when the temperature is high in summer.

Rhododendron likes high humidity environment, and the air humidity is not enough, which is also an important reason for Rhododendron falling leaves.

Rhododendron root system is very thin, if watered too much, it is easy to rot and lose leaves.

How can we ensure the humidity required for the growth of azaleas? You can use a set of pots, that is, the pot inside is earthen pot, and there is a distance of 5 cm to 10 cm between the pot outside and the earthen pot. This distance can be stuffed with some water-retaining materials like Zhishi, and water can be poured on the outer layer to ensure that this place inside will not dry quickly. On the other hand, ensure a certain humidity, so that the humidity can be adjusted. Cover the flowers with plastic bags, cut a small mouth to breathe, and put the flowers in a large tray to increase the humidity, but be careful not to spray water on them.

Rhododendron is an acid-loving flower, and the pH value of the soil should be stable between 4.5 and 6. If tap water is irrigated regularly, the soil will also become alkaline. Alkaline soil, alkaline water and azaleas are unbearable. In alkaline environment, rhododendrons not only shed leaves, but even die. Rhododendron is a shade-loving flower and can't be irradiated by strong light. In winter 1 1 By next April, you can see more sunshine indoors. It is impossible to see the sun. It will cause buds to fall off on cloudy days. Every year from May to June, 10, the sun can only be seen before 9 am. At other times, it needs shade maintenance. Under the scorching sun, young leaves are easy to be burned, and branches and leaves are easy to wither and fall off. In severe cases, the whole plant dies and has to be prevented. Pay attention to frequently spraying leaves to increase humidity and maintain a certain humidity (the relative humidity of air should be kept above 70%).