Don't fertilize Rhododendron at flowering. Before flowering, Rhododendron has accumulated enough nutrients, which may not be absorbed by Continuous Fertilization plants. At this time, the accumulation of fertilizer may damage the roots. And also can cause florescence to shorten, the bud that does not open falls off and so on.
1. Spring: spring is not only the growth period of Rhododendron, but also the important period of flowering. At this time, we should choose thin cake fertilizer water to provide rich nutrients. At the same time before flowering to apply phosphorus and potassium fertilizer, which can make flowers larger, more.
2. Summer: Rhododendron will enter a semi dormancy state in summer. 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 also the stage of flower bud differentiation. At this time, the fertilizer is mainly composed of P and K. whether the fertilizer is sufficient will determine the flowering situation in the next year. Of course, fertilizer should not be too thick, once every 7 days, fertilizer must be watered the next day.
4. Winter: the low temperature in winter will also enter the dormancy period, so it is not suitable for fertilization. But before winter, we should do it once to help it survive safely.
