http://healthliving.info/how-to-grow-an-endless-supply-of-ginger-indoors-using-nothing-but-a-container/

Growing Ginger At Home Isn’t That Hard…

Step 1: Soak Your Ginger

Many ginger roots sold commercially are coated with a growth inhibitor, which prevent them from sprouting in the grocery store (even organic ones).

So, your first step after buying your ginger is to let it soak in water for 24 hours before slicing it up to plant.

Step 2: Look For Growth Buds

Look for pieces with well developed “eyes” or growth buds. (The buds look like little horns at the end of a piece or “finger”).

The indentations on the surface of the root is where the sprout will grow.

If the ginger you have doesn’t have any, you can even encourage them to do so by leaving them near a windowsill before you plant. (This just takes a few days)

Step 3: Choose a Wide Container

Because ginger’s roots grow horizontally, the width of your container will be more important than the depth. Once you’ve decided on what kind of container you’ll use, proceed to filling it with a rich potting soil that will drain well.

Step 4: Plant Your Ginger

Select pieces of the ginger knob that have “eyes” on them. Place the piece of ginger with the eyes facing up into the soil, and cover with about and inch and a half of soil.