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A picture of a Oregon iris

Oregon iris

Iris tenax

Partial Shade
Moderate watering
Frost Hardy

H5

RHS hardiness

-15°C

Minimum temperature

Expected size

Height
Spread

40cm

Max

60cm

20cm

Min

50cm

Flowering

  • spring
  • summer
  • autumn
  • winter

Oregon iris Overview

This is a deciduous beardless species. It will grow to about 30cm tall with dark green foliage which is stained pink at the base. The flowers will bloom from mid-spring into the summer. The blooms are about 9cm across and they are blue, lavender, yellow or white, and often have yellow and white markings on the falls.

Common problems with Oregon iris

How to propagate Oregon iris

Division

By division of rhizomes or offsets in late summer. Certain cultivars should be propagated by division only.

Rhizomes

Seed

Seed in autumn.

Other uses of Oregon iris

Grown for their distinctive and colourful flowers. Suitable for coastal conditions.