Iris 'Sulphureux'
iris 'Sulphureux'
A rhizomatous perennial to around 80cm tall with fans of sword-shaped, greyish-green foliage. Flowers borne on well-branched stems from late spring into early summer comprise pale yellow-white standards, creamy falls striped with yellow and brown markings and edged with white and a small orange beard
Size
Ultimate height
0.5–1 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Yellow White Cream Brown Orange | Green Grey Silver | ||
|---|---|---|---|---|
| Summer | Yellow White Cream Brown Orange | Green Grey Silver | ||
| Autumn | Green Grey Silver | |||
| Winter |
Position
- Full sun
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered Hardiness
H7Botanical 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
Unresolved
How to grow
Cultivation
Grow in well-drained, fertile, neutral to slightly acidic soil in full sun. Do not cover the rhizomes with mulch, or allow other plants to shade them; sun on the rhizomes encourages flowering. Give a high potash feed in spring and divide every three to four years. See also bearded iris cultivation
Propagation
Propagate by division of rhizomes from midsummer to early autumn; see dividing irises
Suggested planting locations and garden types
- Coastal
- Cottage and informal garden
- City and courtyard gardens
- Flower borders and beds
- Wall side borders
Pruning
Remove any dying foliage in autumn; old flower stems can be cut down after flowering
Pests
Diseases
May be susceptible to aphid-borne viruses, bacterial soft rot and grey moulds; see Iris diseases
Get involved
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