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.
How to make a Sub-Irrigated Planter. I'm not sure I would use a two liter plastic bottle though. Over time I would fear the plastic breaking down enough to poison the plant. Perhaps a wine bottle instead.