perennial

Swamp Lily

Crinum pedunculatum

The Story

Plant Bio

Crinum pedunculatum, commonly known as the swamp lily, is a robust, clump-forming evergreen perennial native to coastal eastern Australia. It produces a bold, architectural rosette of thick, fleshy, strap-shaped leaves up to two metres long, arising from a distinct pseudostem.

During spring and summer, the plant bears upright, thick flower stems carrying large, sweet-scented umbels of spider-like white flowers with prominent purple filaments. This species is exceptionally versatile, thriving in both waterlogged, boggy soils and dry, established garden beds once its deep root system is established.

Uses & Benefits:

Provides a bold, tropical architectural focal point with its massive rosette of strap-like leaves and fragrant, spider-like white flowers.

Highly effective for soil stabilisation along wet creek banks, tidal margins, and boggy areas prone to temporary flooding.

Attracts native bees and butterflies to the fragrant blooms, while the foliage supports the life cycle of native moths, drawing insectivorous birds.

Essentials

At a Glance

Plant Type

Perennial

Height

118 inches

Width

118 inches

Light

Full Sun, Partial Sun, Shade

Zones

9, 10

Water

Moderate to high

Humidity

High

Lifespan

Perennial

Native To

Australia, New Guinea, Pacific Islands

Toxicity

Toxic if ingested, skin irritant

Bloom period

Spring – Summer

In flower about 4 months of the year

Planting

How to Grow

Select a planting site in full sun to partial shade with adequate space to accommodate the mature three-metre spread.
Dig a hole twice the width of the root ball and plant at the same depth as the nursery pot, ensuring the pseudostem remains above the soil line.
Water thoroughly after planting to settle the soil around the roots, and maintain consistent moisture during the first active growing season.
Apply a thick layer of organic mulch around the base, keeping it clear of the pseudostem to prevent rot.

Pro Tip

Avoid transplanting established clumps or cutting the foliage back hard to the pseudostem, as this species resents root disturbance and recovers slowly from severe pruning.

Keep It Thriving

Care Guide

Do

Trim away completely dead or yellowed lower leaves at the base to maintain a clean architectural form.
Protect young foliage from heavy frosts using temporary covers if grown in marginal inland climates.
Hand-pick and destroy striped lily caterpillars at the first sign of foliage damage.

Don't

Do not hack the plant back hard to the bulb or pseudostem unnecessarily.
Do not frequently transplant or disturb established clumps, as this severely reduces flowering performance.
Do not allow the soil to dry out completely during the initial establishment phase.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Pest Check
Propagate
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bog gardensCoastal gardensArchitectural feature plantingRain gardensUnderstory planting under established trees

Companion Plants

Alocasia brisbanensis Dianella caerulea Lomandra longifolia Colocasia esculenta

Multiply

Propagation Methods

Good to Know

Common Questions

Swamp Lily questions

What zones can Swamp Lily grow in?

Swamp Lily is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Swamp Lily bloom?

Swamp Lily typically blooms in spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Swamp Lily need full sun?

Swamp Lily does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Swamp Lily drought tolerant?

Yes — once established (usually after the first full season), Swamp Lily handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.