Oxalis purpurea can be pointed, which means cutting off the branches at the top. This method is mostly used when the plant is in virtual length, which can control its height well, promote the germination of lateral branches and grow better. The time should be chosen in the growing period and when the sun is abundant, the environment is suitable and the wound heals faster. When sharpening a knife, prepare sharp tools in advance and use them after disinfection. In addition, it is necessary to change the conservation environment, do not see the light for a long time, and do not apply too much nitrogen fertilizer to avoid another wasted growth.