What is the difference between young ginger and mature ginger?
Young ginger hasn't fully matured. It has transparent skin, pink flesh, and a much milder flavor. It's often used for pickling, since it has a much lighter flavor.  Mature ginger is what we are used to seeing in the grocery stores. It is fibrous and stiff and breaks with a snap. This ginger is sharper, spicier, and less floral than its younger counterpart.