Iris versicolor 'Rowden Cadenza'

RHS Plant Profile

iris 'Rowden Cadenza'

Aquatic Bogs

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A marginal, deciduous perennial with strap-like mid green leaves and pink to lilac-mauve and white flowers with purple veining and a yellow centre which have an open habit apppearing May to June. Suitable for bog gardens, ponds, lakes and streams

Position

Full sun

Soil Types

Clay, Loam

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Clay Loam

Moisture: Poorly–drained
pH: Acid or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H6

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, Columnar upright
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: Accepted

How to Grow

Cultivation

Plant in heavy clay or loam soil or a specialist aquatic soil in baskets or planting bags. Water depth should be between 0 and 10cm over the rhizome. Suitable for bog gardens, ponds, streams, ditches, swimming pools, patio water-gardening or any poorly drained area of the garden. See pond plants for further advice

Propagation

Propagate by dividing iris rhizomes from midsummer to early autumn. See dividing irises

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden

Pruning

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

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to aphid-borne viruses, bacterial soft rot and grey moulds; see Iris diseases