About
Iris innominata is an evergreen, rhizomatous perennial to 25 cm with very narrow, purple-red-based leaves. From late spring, stems bear one or two flowers in cream, yellow, orange or shades of pink, purple or blue. A beautiful and variable Pacific coast iris for a well-drained, partly shaded border.
About the genus
Iris, the irises, are rhizomatous or bulbous perennials producing narrow, often sword-shaped leaves and distinctive flowers with three large, spreading or pendent fall petals alternating with three erect standard petals. They flower from late winter to early summer in every colour of the rainbow.
Growing conditions
SunlightFull sun, Partial shade
Soil typeLoam, Sand, Clay
Soil pHAcid, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectSouth-facing, North-facing, East-facing, West-facing
ExposureSheltered
UK hardinessH6
Plant details
Plant typeHerbaceous Perennial
HabitClump forming
FoliageEvergreen
Height0.1-0.5 metres
Spread0.1-0.5 metres
Time to full height2-5 years
Suggested usesCity and courtyard gardens, Coastal, Cottage and informal garden
Native toW USA
ToxicityHarmful if eaten. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
CultivationGrow in well-drained, neutral to acidic soil in full sun or partial shade
PruningRemove any dying foliage in autumn, old flower stems can be cut down after flowering
PropagationPropagate by seed or by division. See dividing irises
Pest resistanceMay be susceptible to slugs, snails and thrips
Disease resistanceMay be susceptible to aphid-borne viruses, bacterial soft rot and grey moulds; see Iris diseases