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Herbaceous Perennial

Iris 'Knick Knack' (MDB)

iris 'Knick Knack'

'Knick Knack' is a compact perennial, to 15cm tall, with grey-green foliage and small, delicately-coloured spring flowers comprising white standards with dark blue edging and white falls with lighter blue markings

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue White Green Grey Silver
Summer Green Grey Silver
Autumn Green Grey Silver
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
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
Miniature Dwarf Bearded irises are deciduous rhizomatous perennials growing to 20cm tall, with broadly linear leaves and flowers 4-8cm across in late spring and early summer

How to grow

Cultivation

Grow in well-drained, preferably neutral to alkaline soil in full sun but acid soils are tolerated if well-drained. Sun on the rhizomes will encourage flowering. See also bearded iris cultivation

Propagation

Propagate by dividing iris rhizomes from midsummer to early autumn

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

Remove any dying foliage in autumn, old flower stems can be cut down after flowering

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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