Rhododendrons bloom mostly in winter and spring when the climate is cooler, and people who buy flowers also buy them in winter. Our climate in Shanxi is relatively cold. Most of the flowers sold by flower sellers are kept in flower pits or plastic greenhouses. The temperature in the flower pit is very high, and there is a big difference between the temperature in the flower pit and the temperature outside the flower pit. If the rhododendron leaves the pit without any protective measures, the flowers are easily attacked by the cold wind. As soon as the cold wind blows, the flowers catch a cold. A cold rhododendron leaves easily, especially the old leaves, which will fall off one after another. Preventive measures include: pay attention to protection when buying flowers to prevent flowers from catching a cold.

Although the root system of rhododendron is rich, it is very delicate and as fine as an ox hair. This slender hair root is afraid of both waterlogging and drought. Too much watering will cause water accumulation in the basin, root rot caused by root tip blockage, and leaves are easy to fall off; If you forget to water it once or twice, the root tip will easily dry up and lose its leaves. If you find the leaves wilting and drooping, you can water them immediately. If the leaves don't stand upright, there is no hope, and the whole plant is likely to die. Solution: water it in time, and then water it when it is dry. When watering, don't let there be water in the basin, just water it thoroughly. If the basin soil is loose wool soil (pine needle soil in the northeast), water it once a day without leakage. Pine needle soil is breathable and easy to dry in the dry climate in the north, so it should be watered once a day.

Du Fu doesn't like big fat. Too much fat will burn the root tip, and it is easy to cause defoliation and even death. It doesn't matter what fertilizer you use, but don't apply thick fertilizer or big fertilizer. Only apply thin fertilizer and little fertilizer once every half month. If the pot soil is new pine needle soil, no fertilization is needed for one year. The pine needle soil is very fertile and can consume azaleas for one year. Next spring, bloom will be replaced with new culture soil.

Rhododendron is an acid-loving flower, and the pH value of the soil should be stable between 4.5 and 6. This is the key to raising azaleas in the north. 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. If tap water is used, it must be acidified. The tap water in Taiyuan has a pH value of 7, which is neutral water, but it is alkaline when used for watering azaleas, so it is not suitable for regular use. Acidification method: 1000ml (1kg) tap water is added with 1g citric acid or 1g oxalic acid. Remember to use it now, not for long. This water can be used for a long time. Some people are used to using ferrous sulfate (black alum) to adjust the pH of soil, but it can't be used excessively, which will cause iron poisoning and be harmful to rhododendrons. 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.

Newly renovated families should not raise azaleas, because harmful gases such as paint smell are easy to harm azaleas and cause deciduous leaves. As soon as the leaves of azaleas fall, there is no hope of living. In this way, azaleas are delicate and difficult to raise, but they are not like this. As long as we carefully grasp the above points, spray water on the leaves every day, increase the humidity and maintain a certain humidity (the relative humidity of the air should be kept above 70%), rhododendrons will grow well and the flowering period can reach 2-3 months.