Not the plant you're looking for? Search over 300,000 plants
Herbaceous Perennial

Iris albicans
  • RHS AGM

white flag iris

Rhizomatous, bearded iris 30-60cm tall, with widely sword-shaped, grey-green leaves and unbranched stems bearing 1-3 fragrant white flowers with yellow-tipped white beards, in late spring

Buy this plant
Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Alkaline, Neutral, Acid
Colour & scent
StemFlowerFoliageFruit
Spring White Yellow Grey Green
Summer Grey Green
Autumn Grey Green
Winter
Position
  • Full sun
Aspect

South–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Iridaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Potentially harmful
All parts may cause severe discomfort if ingested and contact with sap may irritate skin. 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

Plant range
Saudi Arabia

Advertise here

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 after flowering, from midsummer to late summer; for more advice, see dividing irises or propagate by seed

Suggested planting locations and garden types
  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Flower borders and beds
Pruning

Cut down old flower stems after flowering, and remove any dying foliage in autumn

Pests

May be susceptible to iris sawfly, aphids, leaf miners, slugs, snails, and wireworms

Diseases

May be susceptible to iris rhizome rot, iris leaf spot, scorch, a rust, and virus diseases; for more advice see iris diseases

My Garden

Your free RHS gardening coach

Keep track of your plants with reminders & care tips – all to help you grow successfully

My plants
My calendar

My plants

My calendar

My ideas
Manage membership

My ideas

My advice

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.