What is the reason for the withered and yellow azaleas

Poor management of rhododendron flowers in the first year often leads to withered buds in the second year. When the cuckoo blossoms, people like to watch it indoors, but the air is not fresh and there is not enough sunshine. The climate in Shanghai is too warm, so it can be moved outdoors at night and placed in the indoor light place in the morning and evening. After the flowers fade, gradually increase the time to be placed outdoors, and a week later, you can put them in a shaded place outside and cut off the residual flowers in time. Nitrogen-based liquid fertilizer was applied every 10 days to promote new shoots. The weather is hot from June to August, the growth of rhododendron is slow, and fertilization can be stopped. In late September, phosphate fertilizer was applied every 10 days to promote plant and flower bud growth. Fertilization will be stopped after late October. Move to the greenhouse in winter, put it in the visible light, and the room temperature is controlled between 5-15 ℃. If the temperature deviates and the plant germinates new leaves and consumes nutrients, it will affect the flowering in the following spring. In addition, the summer cuckoo is easy to sprout at the root branch at the end of spring, and if it is not cut off in time, it will compete with the mother plant for nutrients and affect flowering.

Cuckoo leaves turn yellow because of iron deficiency in the soil or alkali in the soil, or improper maintenance, which will also lead to falling flowers and buds if no timely measures are taken.

The lack of iron in the soil hinders the synthesis of chlorophyll, resulting in yellowish-white leaves, especially young leaves, which can be irrigated with 500 times ferrous sulfate solution every 7 days until the leaves turn green. If the PH value of the soil is more than 6.5, the leaf color will also turn yellow. ferrous sulfate solution will be applied as mentioned above, and after the plant returns to normal, it will be replaced by acid culture soil dominated by rotten leaves. If the light is too strong or insufficient, too much watering, improper fertilization, heavy soil will cause leaves to yellowing. Proper shading, controlled watering, proper fertilization, and loose acid culture soil can be selected.