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A picture of a Flag Iris

Flag Iris

Diplarrena spp.

Diplarrena moraea by Melburnian (CC BY 3.0)

Full Sun
Half-hardy

H3

RHS hardiness

-5°C

Minimum temperature

Expected size

Height
Spread

1m

Max

50cm

50cm

Min

10cm

3 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Flag Iris

Diplarrena latifolia
A photo of Flag Iris
A photo of Flag Iris

Flag Iris Overview

Diplarrena is a small genus containing just 2 rhizomatous, perennial, herbaceous species which are endemic to Australia and are thus only found growing there. They produce attractive white flowers which resemble those of Irises and tend to be produced on unbranched, 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 and linear to sword-shaped. This plant 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, it grows best in neutral to slightly acidic soil and if planting in a hot site, can cope with partially shaded light.

How to propagate Flag Iris

Division

Divide in spring.

Seed

Sow seed in autumn or spring.

Special features of Flag Iris

Attractive flowers