1. temperature: during the whole growth period, the optimum temperature is 19 to 25 degrees, which can be kept in this range all the time. If it is planted in a greenhouse, then the temperature does not need to be adjusted, and it is generally suitable. If you plant at home, you should pay attention to cold protection in winter. 2. illumination: American ginseng is very afraid of strong light. Strong sunlight will not only hinder its growth, but also make it suffer from "sunburn". So it is enough to provide astigmatism or diffuse light at ordinary times. Direct light must be avoided, especially in summer, and the shading degree is preferably between 70% and 75%. 3. watering: American ginseng likes a slightly dry environment, and too wet has an adverse effect on it. Generally speaking, the humidity of soil should be between 25% and 30%, and it should not be too wet. 4. Fertilization: American ginseng does not need too much fertilizer, and can only be used in June and July, the fastest growing season. The method of topdressing outside the root is generally used once or three times.

Second, feeding skills

1. Propagation: common sowing. Its seeds have long-term dormancy characteristics, so it is necessary to accelerate germination before sowing. Sowing time is best in February or March. The plant spacing can be 5cm, and the row spacing can be about10cm. After sowing, the thickness of covering soil can be about 3 cm, and it needs to be covered with a layer of straw or fallen leaves to keep warm and moist. 2. Change pots: If it is potted, it can be changed once a year or two. The size of the flowerpot can be determined according to the specific volume. If it grows very big, even the flowerpot needs to be replaced.

Third, the problem diagnosis and treatment

1. Diseases: Common diseases include "spot disease", "anthrax" and "epidemic disease". In addition to spraying corresponding chemicals, it is also necessary to disinfect the soil with lime and control water and drainage in time. 2. Pests: There are many kinds, such as "ground tiger", "grub" and "golden needle worm". Light can be used to trap them or drugs can be used.

Four. Other issues

1. Toxicity: non-toxic, it is a tonic. 2. Can you leave it at home? Yes, but not much, because it is not mainly for viewing.