Prepare a small pot for planting by filling with a cutting starter mix. Pour about an inch of rooting hormone in a plastic cup.
Cut small sections of fleshy stems from galangal using a sharp scissors. Remove any leaves from the lower half of the stem.
Insert a pencil at a depth of about 2 inches to create planting holes for the cuttings. Dip the base of the cuttings into the rooting hormone, and plant immediately in individual planting holes.
Firm the soil around the cuttings and water well. Place the pot in a large, clear plastic bag. Insert a chopstick in the pot to help hold the bag up. Close the top with a rubber band. This will help to create a greenhouse effect.
Place the pot in a warm, bright area out of direct sunlight. Open the bag every three to four days and water enough to keep soil moist. Cuttings generally root within a few weeks.
Transplant to a shaded spot in the garden with moist, fertile soil. Galangal grows bets in warm, tropical weather. Harvest the root when the leaves yellow and die.