The planting of Catalpa can be carried out in spring and autumn. Before planting, dig the planting hole. In addition, planting with soil ball can improve the survival rate, but also pay attention not to plant too deep. Too deep will cause the plant to have dull buds. When planting, apply some rotten base fertilizer and mix it with the planting soil. After planting, water the head water once, and then water the head water three days and five days respectively.
In the daily maintenance, we should pay attention to the water management of Catalpa trees. In addition to the first three water poured after planting, we should also choose to pour two times of water permeability between May and October. When there is a lot of precipitation in summer, it is not too dry and does not need to be watered. In winter, we should also apply antifreeze water. After four years, just water the green water and antifreeze water. In addition, catalpa likes fertilizer. When planting, apply enough basic fertilizer. In May, apply some urea, which can make the plant flourish and accelerate its growth.
Because the sprouting power of catalpa tree is strong, so it is resistant to pruning. When the new branches reach about 30cm in spring, select the appropriate main branches and cut off the redundant branches. In the growth period, the newly extracted buds should also be wiped out. If the crown is to be expanded, the main branches need to be cut to retain the external buds.
Catalpa trees are also vulnerable to the threat of pests. Common pests include Perry bug, moth, Paulownia beetle, catalpa beetle, etc., which can be controlled by spraying insecticides. In addition, the common disease of catalpa tree is anthrax, which is easy to occur under the condition of high temperature and poor ventilation, so in addition to spraying pesticides, we should pay attention to the water and fertilizer management of catalpa tree, so as to improve the resistance of the plant.
