Campanula poscharskyana 'Hirsch Blue'

RHS Plant Profile

trailing bellflower 'Hirsch Blue'

Herbaceous Perennial

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A spreading, small, semi-evergreen, trailing alpine perennial with green, lance-shaped foliage and numerous, outward facing, bright blue star-shaped flowers providing a long flowering display in summer. Easy to grow in containers, dislikes wet winters.

Position

Full sun, Partial shade

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

Position

Full sun Partial shade

Aspect: East–facing or North–facing or 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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Campanulaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Spreading branched
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

Will grow well in well-drained soil preferably in full sun to partial shade. Avoid wet winter conditions. Easy to grow in containers.

Propagation

Propagate by division in spring or autumn and by basal cuttings in spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Hanging Basket
Patio and container plants
Rock garden
Wildlife gardens
Flower borders and beds

Pruning

Cut back after flowering to promote extended blooms

Pests

May be susceptible to slugs and snails

Diseases

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