From the second year of planting, the core method can fix the stem and shape the oleander plant. In order to make oleander blossom again, it is necessary to pick the heart properly after each flowering, so that the number of flowering can reach 3~4 times a year.

Pruning can make the plant shape of oleander full and blossom luxuriantly, and it can also be achieved by dwarfing culture and pruning oleander plants. When the height of the newly cultivated trunk reaches 40 cm, the top is cut off from the whole leaf node of the axillary bud at the position of 20~30 cm. After half a month, the new buds can grow and develop into the first layer of the year with 3 branches.

After autumn or early spring, according to the growth of new branches, the height of top pruning is determined, and the height of second pruning is about 70 cm. After three times of shaping and pruning, the crown of oleander can be "three forks and nine tops", with short and plump plant shape and good ornamental effect. The pruning work in the future is mainly to cut off the sick branches and the aging branches, so as to make them flourish and blossom.

When the old oleander post is rebuilt, it is necessary to choose strong main branches and cut off sprouting branches, which can develop and take shape in the second year after plastic surgery. After the oleander was trimmed, the crown was full and "mushroom-shaped".