1、 Base fertilizer

The base fertilizer is generally mixed into the substrate when the Rhododendron is planted or the pot is changed, and the compound fertilizer with balanced proportion of nitrogen, phosphorus and potassium is usually selected. The fertilizer should not be too thick, because the plant needs to slow the seedling at this time, and the thick fertilizer will be unfavorable to its growth, so it should be diluted before use

2、 Pre flowering fertilization

Before flowering, sufficient fertilizer can increase the number of flowers and help the quality of flowering. At this time, phosphorus fertilizer is the main fertilizer, and a small amount of potassium fertilizer is added to improve the resistance of plants. Apply less or no nitrogen fertilizer, otherwise it will grow in vain and hinder flowering

3、 Fertilization at flowering stage

Generally, fertilization is not required during flowering. At this time, it will absorb nutrients in the soil and does not need additional fertilizer. Improper fertilization is likely to shorten the flowering period and even wither the flower buds

4、 Fertilization after anthesis

After flowering is another important period of fertilization. Because Rhododendron flowering will consume a lot of nutrients, it needs to supplement a certain amount of nitrogen fertilizer. It enters the semi dormancy period in summer, and fertilization is not required at this time. But from August to September, it will resume growth. At this time, phosphate fertilizer should be applied every 15 days. Stop fertilizing after winter