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Conservatory GreenhouseHerbaceous Perennial

Canna 'Corail'

Clump-forming perennial to 1.5m tall with dark purple paddle-shaped leaves, and stems flushed with very dark purple, almost black. Bright tomato-red flowers appear from early summer to mid-autumn

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Ultimate height

1–1.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

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)

Botanical details

Family: Cannaceae
Native to the UK: No
Foliage: Deciduous
Habit: Clump forming
Genus: Canna are rhizomatous herbaceous perennials with erect stems bearing ovate leaves, with showy flowers with showy petal-like staminodes and small, coloured petals and sepals, borne in racemes or panicles in summer and autumn
Name status: Unresolved

How to grow

Cultivation

As a patio plant grow in pots of loamless compost in a sheltered site in full sun. Plants can also be planted into a sunny border. Water freely and apply a high potassium feed every 2-3 weeks in the growing season. Lift the rhizomes in autumn when frost blackens the foliage. Store over winter in barely moist compost in frost-free conditions. See canna cultivation for further information

Propagation

Propagate by division of the rhizomes in spring

Suggested planting locations and garden types

Architectural
City and courtyard gardens
Coastal
Cottage and informal garden
Patio and container plants
Bedding
Conservatory and greenhouse
Flower borders and beds

Pruning

No pruning required but deadhead to promote continued flowering

Pests

May be susceptible to glasshouse red spider mite, aphids, slugs and snails

Diseases

May be susceptible to canna viruses

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