Campanula carpatica var. turbinata 'Isabel'

RHS Plant Profile
tussock bellflower 'Isabel'

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tussock bellflower 'Isabel' RHS
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Alpine Rockery Herbaceous Perennial

'Isabel' is a compact, mound-forming perennial to around 15cm high with toothed and rounded leaves. Bowl-shaped, upturned, light violet-blue flowers are borne in profusion in summer

Position

Full sun, Partial shade

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
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
West–facing or South–facing or North–facing or East–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)
H5

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
Campanula may be annuals, herbaceous or evergreen perennials, with bell or star-shaped, often blue, flowers in late spring or summer
Name Status
Accepted

How to Grow

Cultivation

Ideal for rock gardens or sunny borders. Will not tolerate wet winters

Propagation

Propagate by seed or basal cuttings

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • City and courtyard gardens
  • Patio and container plants
  • Rock garden
  • Wildlife gardens
  • Garden edging
  • Ground cover
  • Underplanting of roses and shrubs

Pruning

No pruning required

Pests

May be damaged by slugs and snails

Diseases

May be susceptible to a rust, powdery mildews and a leaf spot