Phyteuma nigrum

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black horned rampion

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Herbaceous Perennial Alpine Rockery
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A small alpine perennial to a height of 30cm, with a basal rosette of narrow heart-shaped green leaves and deep spiky-looking, but soft, blue-purple cone-shaped flowers on long stems in summer

Position

Full sun, Partial shade

Soil Types

Chalk, Sand, Loam

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

Position

Full sun Partial shade
Aspect
East–facing or North–facing or West–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
Campanulaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
A genus of flowering herbaceous perennials, native to Europe and Morocco. Foliage is alternate and petiolate, varying in shape between cultivars. Flowers are produced in dense panicles with narrow, five-lobed corolla and are mostly purple, but sometimes pale blue, white or pink
Name Status
Correct
Plant Range
C Europe

How to Grow

Cultivation

Ideal for rock garden or scree in well drained soil in sun or part shade

Propagation

Propagate by seed in autumn in sheltered position or cold frame

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Rock garden
  • City and courtyard gardens
  • Low Maintenance
  • Garden edging
  • Wall side borders
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to damage by slugs and snails

Diseases

Generally disease-free