Alpinia zerumbet aka Shell Ginger

Alpinia zerumbet, or shell ginger, belongs to the ginger family. Its native range spans southern Japan, Taiwan, and southern China. It extends south to the northern Malay Peninsula. This evergreen perennial grows from a creeping rhizome. It lives in shaded parts of open forest. Growers also raise it across tropical and subtropical regions.

Leafy stems form tall, upright clumps above the ground. Outdoor plants reach about 8–10 feet (2.4–3 metres). Greenhouse plants often stand 4–8 feet (1.2–2.4 metres) tall. Houseplants may stay near 3–4 feet (0.9–1.2 metres). Chicago Botanic Garden reports heights of 12 feet (3.7 metres). Missouri Botanical Garden lists a spread of 4 feet (1.2 metres). The rhizomes give off a scent like ginger. Its evergreen growth gives gardens a leafy accent year-round.

Flowers hang from the tips of stems that bear leaves. The pale pink buds look like small sea shells. They open into tubes with white to pink outer parts. Yellow inner lips contrast with red throats. The blooms have a scent and draw the eye. Flowering varies with the season and growing conditions. Stems must live more than a year before they flower. Ripe fruits split apart and release their seeds. Chicago Botanic Garden lists the plant as attracting birds and butterflies.

Grow shell ginger in rich soil that drains well. Keep the soil moist rather than letting it dry out. It accepts full sun or partial shade. Afternoon shade helps in places with hot summers. Indoors, it needs bright light and humid air. Missouri Botanical Garden lists USDA zones 8–11. Its care notes give a narrower range of 8–10. Colder gardens can use it as a summer annual. Growers can lift rhizomes and store them indoors for winter. Large pots, greenhouses, beds, and borders suit its upright form. Pruning helps keep the plant within the space available. No major pest or disease problems are reported.

People use the leaves to wrap and scent cooked rice. In parts of Malaysia, people eat young stem pith. Leaf sheaths supply fibre for rope, and pulp supplies paper. Traditional medicine uses leaves, rhizomes, and seeds for several complaints. These records describe uses, not proof that treatments work. Useful Tropical Plants reports no known hazards.