Dream State: Grow Your Own Ginger At Home - start it indoors early in the season, as a houseplant. Then move outdoors into your garden in the spring. Every "finger" of the old root will produce a new ginger root.
You will know how to grow celery from a leftover stump after reading this article. The price of celery has gone sky high in my area so I will be growing my own. 17 Apart: Growing Celery Indoors: Never Buy Celery Again