Alpinia purpurata, commonly called Red Ginger, is an evergreen tropical perennial in the ginger family that forms dense clumps of upright, cane-like stems clothed in glossy lance-shaped leaves. Its showy colour comes not from petals but from waxy, long-lasting bracts arranged in a cone-shaped spike, in vivid red or soft pink, with small white true flowers peeking out.
In India it thrives in the humid coastal belts and warm interiors of Kerala, Karnataka, Tamil Nadu, the Northeast and similar zones, where it is widely planted in gardens, along boundaries and in resorts. The cut spikes are popular in the florist trade because they hold their colour for one to three weeks in a vase.
It needs warmth, moisture and protection from frost, spreading steadily by underground rhizomes to form lush, tropical-looking stands.
Specifications
| Family |
Zingiberaceae |
| Native region |
Malaysia and the Pacific Islands |
| Mature height |
1.8-3 m |
| Mature spread |
0.9-1.5 m clump, spreading by rhizomes |
| Growth rate |
Fast in warm, humid conditions |
| Foliage |
Evergreen, glossy lance-shaped green leaves on cane-like stems |
| Flower colour |
Red or pink bracts with small white true flowers |
| Flower season |
Mainly monsoon to autumn; nearly year-round in warm humid zones |
| Climate zone |
Tropical and warm subtropical (USDA 9b-11) |
Care guide
| Sunlight |
Partial shade to filtered sun; tolerates full sun in humid coastal areas with ample moisture, but leaves scorch in hot dry sun. |
| Watering |
Keep soil consistently moist; water regularly, especially in summer. Avoid waterlogging and let no drying out in heat. |
| Soil / mix |
Rich, well-draining, organic loam with plenty of compost; slightly acidic to neutral pH. Mulch to retain moisture. |
| Temperature |
Thrives at 22-32 C; growth slows below 15 C and it is damaged by frost and cold winds. |
| Humidity |
Loves high humidity (60% and above); ideal for monsoon and coastal climates. |
| Fertilizer |
Feed monthly in the growing season with a balanced fertilizer or compost; supplement with potassium for stronger flowering. |
| Pruning |
Cut spent flower stems at the base after blooming; remove old or damaged canes to encourage fresh growth and air flow. |
| Repotting |
Repot or divide congested clumps every 2-3 years, ideally at the start of the warm/monsoon season. |
| Propagation |
By rhizome division, or by planting the plantlets (keikis) that form on aging flower spikes. |
| Pests & problems |
Generally hardy; watch for spider mites and scale in dry conditions, and root rot in waterlogged soil. |
| Toxicity / safety |
Generally regarded as non-toxic to humans and pets; not listed as poisonous. |
| Difficulty |
Easy |
Uses
<ul><li>Bold ornamental clumps for tropical-style gardens, borders and screening</li><li>Long-lasting cut flowers for vases and floral arrangements</li><li>Landscaping for resorts, courtyards and shaded garden corners</li><li>Mass planting along fences and water features in humid regions</li></ul>
Growing tips
<p>Plant rhizomes at the onset of the monsoon (June-July) when warmth and humidity favour fast establishment.</p><p>In hot, dry interiors of India, site it in partial shade and mulch heavily to conserve moisture; mist or grow near water in summer.</p><p>In North India, protect clumps from winter cold and frost by mulching the base or moving potted plants to a sheltered spot.</p><p>Divide overgrown clumps after a few years to keep flowering vigorous.</p>
