Rhaponticum coniferum

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<em>Rhaponticum</em> <em>coniferum</em> Catherine Lewis

Synonyms

Centaurea conifera
Leuzea conifera

Herbaceous Perennial

A clump-forming perennial to around 30cm high, with divided grey-green leaves with felted undersides. Upright stems bear rounded buds covered with papery brown scales, opening at the top to thistle-like flowers with fine purple florets in midsummer. Flowers dry to pale-coloured 'cones' in late summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–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)
H3

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
A genus of flowering perennials, native to Siberian alpine meadows with green foliage and pink, thistle-like flowerheads
Name Status
Correct

How to Grow

Cultivation

Grow in well-drained soil in full sun, protect from frost and winter wet

Propagation

Propagate by seed or by division in spring, may self-seed in place in good conditions

Suggested planting locations and garden types

  • Cottage and informal garden
  • Mediterranean climate plants
  • Rock garden
  • Low Maintenance
  • Flower borders and beds

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free