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Alpine Rockery

Edraianthus serpyllifolius

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

Synonyms

Wahlenbergia serpyllifolia
Campanula serpyllifolia

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Ultimate height

Up to 10cm

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Loam

Sand

Moisture

Well–drained

pH

Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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)

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

Get involved

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