Rudbeckia fulgida var. deamii

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Deam's coneflower

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Synonyms

Rudbeckia deamii

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Herbaceous Perennial
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A clump-forming, erect herbaceous perennial to 60cm, with densely hairy stems, and oval, dark green, roughly hairy serrated leaves. Black-eyed bright yellow daisies to 7cm in width are produced from late summer to mid autumn

Position

Full sun, Partial shade

Soil Types

Chalk, 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

Chalk Clay Loam
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–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
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
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
Name Status
Correct
Plant Range
C USA

How to Grow

Cultivation

Grow in humus rich, moist but well-drained soil in full sun or partial shade. Able to tolerate drought once established. See rudbeckia cultivation for further advice

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 and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Prairie planting
  • Wildlife gardens
  • Cut flowers
  • Flower borders and beds

Pruning

Deadhead regularly. Can be cut back in autumn, though stems and seedheads persist well and can provide structure in winter

Pests

May be susceptible to aphids and slugs

Diseases

Generally disease-free