Campanula sarmatica 'Hemelstraling'

RHS Plant Profile
Georgian bellflower 'Hemelstraling'

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Herbaceous Perennial
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An upright perennial, to around 80cm high, with long, triangular to lance-shaped green leaves with toothed edges. Tall stems bear loose clusters of open bell-shaped, pale lavender blue flowers, edged with fine, downy white hairs, from late spring to mid summer

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Alkaline or Neutral

Position

Full sun Partial shade
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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Campanulaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Genus
Campanula may be annuals, herbaceous or evergreen perennials, with bell or star-shaped, often blue, flowers in late spring or summer
Name Status
Unresolved

How to Grow

Cultivation

Thrives in fertile, neutral to alkaline, moist but well drained soil in sun or part shade

Propagation

Propagate by division in spring or autumn, or by basal softwood cuttings in spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildlife gardens
  • City and courtyard gardens
  • Coastal
  • Gravel garden
  • Flower borders and beds

Pruning

Cut back after flowering

Pests

May be susceptible to aphids, slugs and snails

Diseases

May be susceptible to powdery mildews and rust diseases