Rehmannia glutinosa is a common Chinese herbal medicine, which is widely used in traditional Chinese medicine. Generally speaking, rehmannia glutinosa just dug out will not be toxic. Because rehmannia needs to undergo strict inspection and treatment during planting and harvesting to ensure its harmlessness. In addition, the toxicity of Rehmannia glutinosa mainly comes from its chemical components, such as saponins and flavonoids, which will only have an impact at a certain dose.
If rehmannia glutinosa is obtained in the process of regular planting and harvesting and meets the national standards, then the newly dug rehmannia glutinosa is safe. Rehmannia glutinosa may be toxic if it is planted or harvested in an inappropriate environment or does not meet the national standards. For example, planting rehmannia glutinosa or overusing pesticides and fertilizers on heavily polluted land will increase the content of harmful substances. In addition, the quality and safety of Rehmannia glutinosa will also be affected if the harvest period is too early or too late.
Growth habit of rehmannia glutinosa
1. Growing environment: Rehmannia glutinosa likes warm and humid environment, the suitable growing temperature is between 15℃-25℃, and the optimum growing temperature is 18℃-20℃. It doesn't require much soil, but it likes fertile, loose and well-drained soil.
2. Growth mode: Rehmannia glutinosa has developed roots and generally grows in a creeping way. Its stems are erect, the height is generally between 30 and 60 cm, the leaves are pinnately divided, and the flowering period is from June to August, and the inflorescence is umbrella-shaped or raceme.
3. Propagation mode: There are two propagation modes of Rehmannia glutinosa: seed propagation and ramet propagation. Seed propagation needs to go through germination and growth, which takes a long time. But ramet propagation is relatively simple, and only mature underground stems need to be separated.