The phenomenon of non-flowering caused by the lack of nitrogen fertilizer, the main phosphorus affecting red. When there is too much nitrogen fertilizer, the branches and leaves grow in vain, and there are many branches and leaves, and the leaves are dark green, and the nutrients are too concentrated on the growth of branches and leaves, which leads to the phenomenon that it is difficult to bloom because of the lack of nutrients to form flower buds. It is also difficult to bloom when phosphorus is lacking, because phosphorus can promote the formation of flower buds, and Anthurium andraeanum is difficult to form flower buds when phosphorus is lacking, so it does not bloom. Generally, 1-2 months before flowering, the fertilizer with high phosphorus and potassium should be buried in the basin, but it should be applied according to the amount to prevent fertilizer damage. Others, such as controlling water before flowering, can also promote the formation of flower buds, and proper sun exposure can also promote flowering.