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Rudbeckia fulgida var. deamii AGM

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© RHS 2000

Characteristics

Plant type

Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H7 (very hardy)

Colour

Flower

Yellow in Autumn and Summer

Foliage

Dark Green in Autumn, Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

Deam's coneflower

Family

Asteraceae


Rudbeckia may be annuals, biennials or rhizomatous herbaceous perennials, with simple or pinnately divided leaves and large daisy-like flower-heads with yellow or orange rays surrounding a prominent conical disk

R. fulgida var. deamii is a clump-forming, erect herbaceous perennial to 60cm, with oval, dark green, roughly hairy leaves and black-eyed bright yellow daisies to 7cm in width from late summer to mid autumn

Synonym(s)

  • Rudbeckia deamii

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing or East-facing
  • Exposed or Sheltered

Cultivation

Easy to grow if given full sun or partial shade and a moderately fertile soil that is moist but well-drained; a good choice for improved clay soils

Soil

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

Propagation

Propagate by seed in pots in a cold frame in early spring. Propagate by division in spring or autumn

Suggested planting locations and garden types

City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds, Cut Flowers, Prairie Planting or Wildlife Gardens


How to care

Pruning

Deadhead faded flowers

Pests

Slugs may damage young growth

Diseases

Generally disease free