Korean ginseng has a root system which includes rhizome head, main root, and lateral roots from which numerous fine roots and root hairs develop.

The shape of KOREA INSAM undergoes a process of transformation as the roots develop. In the first year of sowing, ginseng roots undergo about 17 months of elongation process (4 to 6 months) and flesh-up process (7-9 months) to become seedlings bearing heavy hair.
The hair is trimmed off upon transplant in the second year of sowing. New lateral roots begin to develop, and the length of main roots and the number of lateral roots are set in the third year of sowing.
In the fourth and fifth years, main roots flesh up and the lateral and fine roots grow fully to form the unique shape of ginseng roots.

Six-year-old ginseng which is used for manu-facturing red ginseng has 7~10cm long main root (diameter: 2~3cm) with several lateral roots and large rhizome head. Its total length is about 34cm and weight is 40g - 120g(in some cases, up to 300g).

When roots are grown more than 7 years, root growth appears to be retarded and become ill-shaped with