Rudbeckia subtomentosa

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Herbaceous Perennial
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An upright, herbaceous perennial to 1.5m, with branching stems and lobed leaves. From late summer to autumn it produces daisy-like flowerheads composed of bright yellow ray florets around a central, dark brown cone. The pollinator-friendly flowers are good for cutting

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
1-1.5 metres

Growing Conditions

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

Position

Full sun
Aspect
East–facing or 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)
H5

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 moderately fertile soil that does not dry out. Will tolerate light shade but flowering is best in full sun. See rudbeckia cultivation

Propagation

Propagate by seed or division

Suggested planting locations and garden types

  • Cottage and informal garden
  • Prairie planting
  • Wildlife gardens
  • Low Maintenance
  • Cut flowers
  • Flower borders and beds

Pruning

Cut old stems back to ground level in early spring

Pests

May be susceptible to aphids

Diseases

May be susceptible to Powdery mildews