Pukui in the north is mostly planted in pots and barrels, and moved into low-temperature greenhouses for winter maintenance in winter. Although the mallow can tolerate the low temperature of about 0℃, it should be kept at 1 ~ 5℃ in the greenhouse in the coldest season. In summer, when it moves out of the house, although it likes light, it is afraid of direct light, so it should be kept in the shade. Keep wet and water properly to avoid drought, otherwise the leaves will wither and turn yellow. In order to make it grow vigorously, the leaves are bright green, and topdressing should be done in time during the growth period. When the temperature is lower than 15℃, all plants stop growing and enter a dormant state. At this time, fertilization should be stopped and a small amount of water should be used to prevent root rot. It is best to cover the roots with organic fibers such as sawdust, rice bran and bagasse with a thickness of 10 cm, so as to keep the roots warm and survive the winter smoothly.