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Herbaceous Perennial

Iris 'Florentina' (IB/TB)
  • RHS AGM

Florentine iris

A historic bearded iris, formerly grown as the source of the aromatic orris root, used in perfume making. It is a vigorous, spreading plant with slightly glaucous foliage, sometimes remaining semi-evergreen, and stems to 120cm bearing medium sized flowers. The standards are wide, erect, cupped, the falls are narrow, distinctly drooping, both are silvery white with a slight blue tinge and beards are yellow

Other common names
glaive lily
orrice root
see moreorris root
fleur-de-lys
Synonyms
Iris filifolia 'Florentina'
Iris 'Florentina Alba'
see moreIris germanica var. florentina
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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
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Grey Silver Blue White Green
Summer Grey Silver Blue White Green
Autumn
Winter
Position
  • Full sun
Aspect

South–facing or West–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Iridaceae
Native to the UK
No
Foliage
Deciduous
Habit
Columnar upright
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
Intermediate Bearded irises are deciduous rhizomatous perennials, growing between 40 and 70cm tall, with sword-shaped light glaucous green leaves and erect stems bearing flowers 10-13cm across, bearded on the falls, in late spring and early summer

How to grow

Cultivation

Grow in well-drained, fertile, neutral to slightly acid loam in full sun

Propagation

Propagate by division of rhizomes from midsummer to early autumn

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Coastal
  • 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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