Red ginger (Alpinia purpurata) is a flowering tropical plant, native to Malaysia, that grows from a rhizome similar in appearance to the ginger you purchase in the grocery store. The plant can grow to 15 feet in height but generally stops growing at 6 feet. It's sole flower, called an inflorescence, may grow up to 12 inches long. Red ginger has a high humidity requirement, and outside of the tropics should be grown in a greenhouse. If you live within its USDA Hardiness Zone (10b and 11), red ginger will thrive when planted in the garden.
Fill a planting pot with equal parts of pre-moistened peat moss, potting soil and vermiculite. Create a 2 inch deep planting hole in the center of the pot.
Dust the red ginger rhizome with fungicide and place it in the planting hole. Cover the rhizome with soil.
Place the pot in an area that remains above 60 degrees F and out of direct sunlight. Keep the soil moist, not saturated.
Transplant the red ginger plant into the garden when it reaches 1 foot in height. Choose a sunny area and mix 3 inches of compost and 3 inches of sphagnum peat moss into the soil prior to planting.