Campanula persicifolia 'Bennett's Blue' (d)

RHS Plant Profile

bellflower 'Bennett's Blue'

RHS

Synonyms

Campanula persicifolia 'Wortham Belle' misapplied

Herbaceous Perennial

An erect perennial to 75cm tall, with narrow, dark green leaves and unbranched stems bearing double, pale blue flowers 5cm across in summer

Position

Full sun, Partial shade

Soil Types

Chalk, 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 Loam Sand

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

Position

Full sun Partial shade

Aspect: West–facing or South–facing or East–facing
Exposure: 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: 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

Best grown in fertile, neutral to alkaline, moist but well drained soils in sun or partial shade. Flower colours are best preserved in partial shade. Cut back after flowering to prevent self-seeding and encourage a second flush of flowers

Propagation

Propagate by seed or division in spring or autumn

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
Flower borders and beds
Underplanting of roses and shrubs

Pruning

Cut dead stems to the base before winter

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to powdery mildews