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Helianthus annuus 'Claret'

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© RHS 2000

Characteristics

Plant type

Annual/Biennial or Bedding

Habit

Columnar/Upright

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

Black, Dark Brown and Dark Red in Summer

Foliage

Green in Spring and Summer

Size

Ultimate height

1-1.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

1-2 years


Preferred common name

sunflower 'Claret'

Family

Asteraceae


Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads

'Claret' is a robust annual with dark stems bearing single, black-centred, deep red-brown flowers to 15cm across

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing or West-facing
  • Sheltered or Exposed

Cultivation

Grow in moderately fertile, neutral to alkaline, humus-rich, moist but well-drained soil in full sun

Soil

  • Moist but well-drained
  • Alkaline or Neutral
  • Chalk, Clay, Sand or Loam

Propagation

Propagate by seed sown in-situ or in a pots or modules in spring

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds, Cut Flowers or Wildflower meadow


How to care

Pruning

Cut back after flowering

Pests

Can get slugs and snails

Diseases

May be affected by powdery mildews and sclerotinia diseases