When sprouting in early spring, the sprouting tillers (commonly known as soil buds) should be eliminated in time. At the same time, keep 2 ~ 3 buds on the upper part of the growing branches and remove the remaining buds. Cut off the residual flowers and pedicels in time after the flowers wither, so as to reduce the consumption of nutrients and facilitate the differentiation of flower buds in that year. In autumn, pay attention to eliminating the extra buds at the lower part of the branches. Through pruning year after year, plants become beautiful, vibrant and colorful.