Variegated shell ginger

Sun

Partial shade or filtered sun; morning sun is useful, but strong afternoon sun can scorch the leaves, especially in hot, dry climates.

Water

Keep evenly moist during active growth, without leaving the roots waterlogged. Water less in winter, especially when growth stops.

Soil

Fertile, humus-rich, well-drained soil. For containers, use a moisture-retentive potting mix with good drainage.

Height

4-6 ft (1.2-1.8 m), sometimes taller in frost-free climates

Spread

3-5 ft (0.9-1.5 m), gradually widening through rhizomes

Flowers

Late spring to summer: hanging clusters of pink-tipped white flowers with yellow and red-marked throats. Flowers form on older stems and are uncommon in cool climates.

Foliage

Evergreen. Large, lance-shaped green leaves irregularly striped and streaked with creamy yellow.

Growth

Moderate to fast in warm, moist conditions

Care needed

Medium

• Heat tolerant
• Low allergen

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Moderate

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   2.6 ft (0.8 m)

3. After 2 years

   4 ft (1.3 m)

4. After 3 years

   5 ft (1.5 m)

   full size

About 2 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Mildly toxic: may upset a stomach

Invasive in

the US and Australia

In the garden

Spreads vigorously: plan to contain it.

Growth rate

Fast

• Water deeply when the soil surface begins to dry during active growth.
• Apply a balanced slow-release fertiliser in spring, following the label rate.
• Mulch with compost or leaf mould to conserve moisture, keeping mulch away from stem bases.
• Shelter the leaves from strong winds, which can split and shred them.
• Move containers under cover before frost in cold climates; keep them bright and frost-free.
• Divide congested clumps in spring once warm weather returns.

Pruning. Remove dead or badly damaged stems at ground level in spring, once frost risk has passed. Cut spent flowering stems back to the base, but retain healthy older stems if you want flowers.

Early spring

Check overwintered plants and remove dead stems when frost danger has passed.

Spring

Divide crowded clumps or repot container plants as new growth starts.

Late spring

Plant outdoors after frost and feed established plants.

Summer

Water regularly, check leaf undersides for pests and provide shade if foliage scorches.

Autumn

Bring pots under cover before frost and reduce watering as growth slows.

Winter

Keep sheltered container plants barely moist; protect outdoor rhizomes with mulch in marginal climates.

• Use as a bright foliage accent beneath open-canopied trees, where filtered light brings out the yellow striping.
• Plant behind smaller shade plants to give a border height and a leafy tropical backdrop.
• Grow in a large container beside a sheltered patio or entrance, with room for the arching stems.
• Combine with dark green elephant ears and ferns for contrasting leaf shapes without relying on flowers.

Garden styles it suits: Modern tropical, Tropical, Luxury resort, Modern courtyard, Balinese and Architectural minimal.

Plant it with: Elephant ears, Cast iron plant, Bird's nest fern, Bromeliads, Peace lily and Clivia.

Wildlife: Flowers can attract bees and other insects where the plant blooms. Its main garden value is foliage rather than dependable nectar or food for wildlife.

• Brown, scorched leaf edges: shelter from hot afternoon sun and drying winds, and keep soil moisture consistent.
• Spider mites, especially indoors: check for fine webbing and stippled leaves; rinse foliage and treat persistent infestations with insecticidal soap labelled for the plant.
• Mealybugs or scale: inspect leaf bases and stems, isolate affected pots and use a suitable labelled treatment.
• Rhizome rot in cold, wet soil: improve drainage, reduce winter watering and remove soft, rotten sections.

Not known to be toxic to cats, dogs, horses or people. It is an ornamental plant, not a substitute for culinary ginger; chewing leaves or rhizomes may still cause stomach upset.

Where it spreads. The species can escape cultivation and form dense stands in warm, wet climates, including Hawaii and parts of Queensland and New South Wales, Australia. The variegated cultivar spreads mainly through rhizomes and discarded divisions; keep garden waste out of bushland and waterways.

• Variegated butterfly ginger (Hedychium coronarium 'Variegatum')

  It produces upright, fragrant white flower clusters rather than hanging shell-like flowers; its leaves are generally narrower.

• Variegated spiral ginger (Costus arabicus 'Variegatus')

  Its leaves spiral around the stems and are usually edged or splashed with white, rather than striped yellow along arching canes.

• Variegated canna (Canna indica 'Variegata')

  It has broader, paddle-shaped leaves and upright spikes of conspicuous flowers, rather than the drooping flower clusters of shell ginger.

Alpinia honours the Italian physician and botanist Prospero Alpini, 'Variegata' refers to the striped foliage, and shell ginger describes the shell-like flower buds.

Propagation. Divide rhizomes in spring or early summer, keeping several healthy shoots and roots on each division. Replant at the original depth and keep moist in partial shade while establishing; division preserves the variegation.

Accepted botanical name

Alpinia zerumbet

In the US and Canada

Introduced in Hawaii, the lower 48 states, Pacific Basin, Puerto Rico and US Virgin Islands.

Native range

Bangladesh, Cambodia, China South-Central, China Southeast, Hainan, Japan, Laos, Malaya, Myanmar, Nansei-shoto, Taiwan and Thailand.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.