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Herbaceous Perennial

Iris 'Caterina' (TB)
  • RHS AGM

iris 'Caterina'

A vigorous, spreading herbaceous perennial, with stiff, straplike leaves to 60cm long. Produces tall, branching stems of large, fragrant, pale violet blue flowers, with yellow beards and olive-brown veining on the hafts, over a long period from spring into early summer

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Loam
Sand
Moisture
Well–drained
pH
Neutral, Acid
Colour & scent
StemFlowerFoliageFruit
Spring Purple Blue Green
Summer Blue Purple Green
Autumn Green
Winter Green
Position
  • Full sun
Aspect

South–facing

Exposure
Sheltered
Hardiness
H7
Botanical details
Family
Iridaceae
Native to the UK
No
Foliage
Semi evergreen
Habit
Clump forming
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling
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
Tall Bearded irises are herbaceous rhizomatous perennials to 70cm or more, with flowers 10-20cm across, bearded on the falls, in late spring and early summer

How to grow

Cultivation

Thrives in a sunny position, in neutral to slightly acid soil with good drainage. Plant rhizomes just above soil level, as sun on the rhizomes encourages flowering. See bearded iris cultivation

Propagation

Propagate by division, see dividing iris for more detailed advice

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

Remove spent flower stems and any dying foliage in autumn

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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