One of the more important herbs in Chinese medicine. Thought to aid ones wellbeing through improving the immunity system, bolstering cardiovascular health along with having anti-viral and anti-inflammatory capabilities amongst others. Refer to google for more detailed information. The mature roots of 2/3 year old plants are the only parts used medicinally. Easy to grow in dry sandy free-draining soil where the rhizomous roots can be left undisturbed