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A picture of a Western Flag Iris

Western Flag Iris

Diplarrena latifolia

Also known as

Butterfly Flag

Diplarrena latifolia by peganum (CC BY-SA 2.0)

Full Sun
Moderate watering


RHS hardiness


Minimum temperature

Expected size








3 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

This plant has a mild fragrance

More images of Western Flag Iris

A close up of a white Diplarrena latifolia flower

Western Flag Iris Overview

Diplarrena latifolia is a rhizomatous, perennial, herbaceous species in the Iris family, Iridaceae. It is endemic to Australia and produces attractive white flowers which resemble those of Irises and tend to be produced on unbranched stalks in clusters, they are generally scented and do not last very long. It has an upright habit and is half-hardy, coping with temperatures down to -5 degrees Celsius, plant in a position of full sun, in moist, well-draining soil for optimal growth. This plant grows best in neutral to slightly acidic soil and if planting in a hot site, can cope with partially shaded light. The main difference between this plant and the other related species in Diplarrena is the size, this species typically grows larger, to between half a metre and a metre in height.

How to propagate Western Flag Iris


Divide in spring.


Sow seed in autumn or spring.

Special features of Western Flag Iris

Attractive flowers

Other uses of Western Flag Iris

Grown for its attractive flowers.


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