Phyteuma orbiculare

RHS Plant Profile
round-headed horned rampion

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round-headed horned rampion visionspictures.com
round-headed horned rampion visionspictures.com

Other common names

round-headed rampion

Herbaceous Perennial

A rare native, limited to a few southern counties of England, with deep blue flowers on unbranched, 30-50cm stems above a cluster of oval to lance-shaped leaves. The unusual globular flowerheads consist of up to 30 narrow, tubular, incurved flowers and appear from early to late summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Size

Time to Maturity
2–5 years

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Campanulaceae
Native to GB/Ireland
Yes
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
Europe

How to Grow

Cultivation

Occurs naturally in open chalk grassland preferring neutral to alkaline, well-drained soil in a sunny spot

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Wildflower meadow

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free