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BogsHerbaceous Perennial

Iris 'Holden Clough' (SpH)
  • RHS AGM

iris 'Holden Clough'

A rhizomatous, clump-forming moisture-loving perennial to around 70cm with grey-green foliage and unusual pale yellow flowers with brownish-maroon red veining appearing from May to September

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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
Clay
Loam
Moisture
Poorly–drained
pH
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Yellow Brown Red Grey Silver Green
Summer Yellow Brown Red Grey Silver Green
Autumn Yellow Brown Red Grey Silver Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H7
Botanical details
Family
Iridaceae
Native to the UK
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

How to grow

Cultivation

Grow in moist to wet, deep, humus-rich, acid soil; thrives at the margins of ponds or streams

Propagation

Propagate by dividing irises from mid-summer to early autumn. See dividing irises

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
Pruning

No pruning required

Pests

May be susceptible to slugs, snails and thrips

Diseases

May be susceptible to aphid-borne viruses, bacterial soft rot and grey moulds; see Iris diseases

Get involved

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