1, pruning after flowering. After flowering in summer, some residual flowers should be cut off to prevent them from bearing seeds, so as to reduce nutrient loss and promote the germination and flowering of new branches. Pruning in the growing period is not suitable for pruning or shortening the new branches sprouting in spring, otherwise it will easily lead to only long branches without flowering. The above are the technical data of cultivation management.

2. Prune in winter. In order to ensure normal flowering and form large inflorescences, pruning in winter is very important. When planting on the ground, the branches of the current year should be cut off at the fixed height of the main branch, so that the robust branches can blossom in the next year. For potted plants, all sprouted branches, diseased branches and overlapping branches should be cut off first. In order to beautify the shape, the full terminal buds of other branches should be cut off at the top of 1 cm, generally leaving only about 5 cm.