how to grow ginger
Look for a fresh looking piece of ginger whose nodules seem to have sprouting potential. "Soak the tubers in warm water overnight, then set them in the pot just below the soil surface, spacing them evenly, with the buds facing up." "Water lightly at first, then more heavily when growth starts." "Plant it in a pot in a place where it will stay warm. It doesn't need full sun, but it does humidity, so you'll need to mist it daily in most climates. When the plant gets to be 12 to 15 inches high, you can dig it up, cut a section from the root to use, and replant it." "Ginger likes shade to part sun and rich dark soil that drains well (lots of compost or gravel - keep it fluffy)."
sources: ehow - how to grow ginger, frugal living - grocery store plants, gardenweb forums - growing ginger. also: "how to grow exotic plants for free"