Siberian iris

Iris sibirica 'Blue King'

Siberian iris - Iris sibirica 'Blue King'

Common Name: Siberian iris
Genus: Iris
Species: sibirica
Cultivar: 'Blue King'

Category: Bulbs, Corms, Tubers & Rhizomatous Plants
Growth Rate: Average

Hardiness: HardyHeight: 0.90 m (90 cm)
Sun/Shade: Full sun or Partial shadeSpread: 0.30 m (30 cm)

Foliage Type: DeciduousFlower Colour: Blue, Purple
Foliage Colour: GreenFlowering Period: May & June

Soil Type: Normal/Loam or Sandy/Light or Chalky/Alkaline
Soil Moisture: Moist, but well drained


  • Other features: all parts of the plant may cause severe discomfort if ingested; contact with the sap may cause skin irritation

Ravishing rich purple-blue ruffled flowers with yellow markings appear in May and June above the slender strap-shaped leaves. This stately Siberian iris is perfect for providing vertical interest in a sunny border with well-drained, fertile soil. A relatively tall variety it's important to stake the branched stems with bamboo canes in early spring well before the flowers appear.

  • Garden care: Plant shallowly with the upper part of the rhizome sitting on the surface of the soil incorporating a low-nitrogen fertiliser in the planting hole. After planting remove the upper-most third of the leaves to minimise the incidence of wind rock. In exposed areas stake with bamboo canes in early spring.


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