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Conservatory GreenhouseHerbaceous Perennial

Canna 'Picasso'

canna 'Picasso'

Fairly compact, clump-forming perennial about 1.2m tall, with large, broad, green or bluish-green leaves, and showy yellow flowers boldly spotted with red, appearing from midsummer to early autumn

Synonyms
Canna indica 'Picasso'
© RHS 1999
© RHS 1999
© RHS 1999
© RHS 1999
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Size
Ultimate height
1–1.5 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Blue Green
Summer Red Yellow Blue Green
Autumn Red Yellow Blue Green
Winter
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Sheltered
Hardiness
H3
Botanical details
Family
Cannaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy, 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

Accepted

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How to grow

Cultivation

As a patio plant grow in pots of peat-free 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 rhizomes in early spring

Suggested planting locations and garden types
  • Architectural
  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Sub-tropical
  • Flower borders and beds
  • Bedding
  • Conservatory and greenhouse
Pruning

Deadhead to promote continued flowering. Leave to dieback in autumn

Pests

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

Diseases

May be susceptible to canna viruses

Get involved

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