Stop watering ginger in late fall to encourage it to go dormant and store energy in its roots.
Harvest ginger after two weeks of dry conditions or wait until its leaves yellow and wither to harvest the largest roots.
Tip ginger out of its container and separate its root from the soil or dig carefully around plants growing in the ground with a garden fork, about 6 inches from the base of the plant. Lift the entire plant and shake the root free of soil.
Brush soil from ginger root and wash it carefully to avoid damaging its skin. Leave it in a dry, airy place to dry and toughen its skin for five days before storing it.
Store ginger root for eating in a refrigerator and ginger for replanting in a cool, dry place.