Iris stolonifera

RHS Plant Profile
stolon-spreading iris
stolon-spreading iris RHS

Synonyms

Iris leichtlinii

Herbaceous Perennial

A rhizomatous herbaceous perennial, 30-60cm high, with prominently-veined blue-green leaves 0.5-1.5cm wide, and flowers 8cm across in late spring or early summer. Flowers vary in colour from pale lilac to deep brownish-purple, the falls darker than the standards; both standards and falls are veined, and flushed at the edges, with purple or brown; the beards are white, cream, yellow or blue; it is dormant in late summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness
H4
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

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
Unresolved
Plant Range
C Asia

How to Grow

Cultivation

Grow in very well-drained soil, in full sun, and with the top surfaces of the rhizomes exposed so that they get baked in summer sun, which encourages flowering; best grown in a bulb frame in containers using gritty, free-draining compost, and kept dry during late summer and winter; may be grown outside in a well-drained sunny site on a bank or in front of a sunny wall, if given protection from heavy winter rain

Propagation

Propagate by seed, or by division of rhizomes after flowering; for more advice, see dividing irises

Suggested planting locations and garden types

  • City and courtyard gardens
  • Rock garden
  • Gravel garden
  • Wall side borders

Pruning

Remove old flower stems after flowering, and any dying foliage

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