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BulbsHerbaceous Perennial

Iris 'Strongold' (Dut)

A Dutch, bulbous perennial to 70cm with upright, narrow bright green foliage. Golden yellow flowers appear from May to June. A great addition to flower borders and ideal for cutting

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Gold Yellow Green
Summer Gold Yellow Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Iridaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Clump forming
Potentially harmful
Harmful 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
Genus

Iris may be rhizomatous or bulbous perennials, with narrow leaves and erect stems bearing flowers with 3 large spreading or pendent fall petals, alternating with 3 erect, often smaller, standard petals, in late winter, spring or early summer

Name status

Accepted

Horticultural Group
Dutch Iris are herbaceous bulbous perennials with narrow, channelled leaves and blue yellow or white flowers in late spring and early summer

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How to grow

Cultivation

Grow in any moderately fertile, well drained soil in full sun. or partial shade. Plant bulbs at twice their height in late summer or early autumn and feed with a high potash fertiliser after flowering. See bulb iris cultivation for more information

Propagation

Propagate by division, separating bulb offsets from midsummer to early autumn

Suggested planting locations and garden types
  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Cut flowers
  • Flower borders and beds
  • Wall side borders
Pruning

Cut down old flower stems after flowering; remove dying foliage in autumn

Pests

May be susceptible to slugs, snails and thrips

Diseases

May be susceptible to leaf spots, ink disease, rust diseases, bulb rot and viruses; see Iris diseases for more details

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.