Edraianthus serpyllifolius

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Synonyms

Wahlenbergia serpyllifolia
Campanula serpyllifolia

Alpine Rockery

A dense, mat-forming evergreen perennial forming tufts of silky grey-green, linear leaves to a height of 5cm. Solitary, bell-shaped deep violet-blue flowers 1.5-2cm in length nestle among the foliage

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
Up to 10 cm

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Alkaline or Neutral

Position

Full sun
Aspect
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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Campanulaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Matforming
Genus
Edraianthus can be evergreen or herbaceous pernnials making tufts of narrow grass-like leaves, with solitary or clustered, bell-shaped flowers in summer
Name Status
Correct

How to Grow

Cultivation

Perfect for the alpine house, scree beds, gravel gardens, crevice, or rock gardens, sinks and troughs. Needs gritty, well-drained, alkaline soil and full sun. Dislikes winter wet

Propagation

Propagate by seed outdoors in autumn or propagate by softwood cuttings in summer, taking the material from sideshoots

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Rock garden

Pruning

No pruning required

Pests

Outdoors, may be susceptible to slugs and snails. In an alpine house, may be susceptible to aphids and glasshouse red spider mite

Diseases

Generally disease-free