1、 Can you fertilize

Don't fertilize azalea during flowering. Before flowering, the Rhododendron has accumulated enough nutrients, and the plants may not absorb them if they continue to apply fertilizer. At this time, the accumulation of fertilizer may damage the roots. Moreover, it will also lead to the shortening of flowering period, the shedding of unopened flower buds and so on

2、 Fertilization time

1. Spring: spring is the growth period of Rhododendron and an important period of flowering. At this time, thin cake fertilizer water should be selected for fertilization, which can provide rich nutrients. At the same time, phosphorus and potassium fertilizer should be applied before flowering, which can make the flowers larger and more in quantity

2. Summer: the Rhododendron will enter a semi dormant state in summer, so it is not suitable to apply fertilizer at this time, but it is necessary to supplement some nitrogen fertilizer in time when the flowers are backward, which can effectively increase the nutrients lost due to flowering

3. Autumn: autumn is the second growth period of Rhododendron, and it is also the stage of flower bud differentiation. At this time, the compound fertilizer dominated by phosphorus and potassium is selected for fertilization. Whether the fertilization is sufficient will determine the flowering situation in the second year. Of course, the fertilizer should not be too thick. It should be applied every 7 days. It must be watered and diluted the next day after fertilization

4. Winter: low temperature in winter will also enter the dormancy period, so it is not suitable to apply fertilizer. But it should be applied once before winter to help it survive the winter safely