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A picture of a Butterfly Flag

Butterfly Flag

Diplarrena moraea

Photo by Sam Wyngart (CC BY 4.0)

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 Butterfly Flag

A white Diplarrena moraea flower on a plant
A close up of a white Diplarrena moraea flower
A white Diplarrena moraea flower and green foliage growing by some rocks
A white Diplarrena moraea flower

Butterfly Flag Overview

Diplarrena moraea 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 wiry stalks in clusters of 2-3 blooms, they are generally scented and do not last very long. Flowers have parts in multiples of three, they are white with purple and yellow colouring in the centre. Foliage is grass-like, linear to sword-shaped and measures approximately 30cm in length. 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 doesn't typically exceed 60cm in height.

How to propagate Butterfly Flag


Divide in spring.


Sow seed in autumn or spring.

Special features of Butterfly Flag

Attractive flowers


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