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Herbaceous Perennial

Campanula portenschlagiana 'Sago'

wall bellflower 'Sago'

A low growing perennial that forms a neat, evergreen mat of atractive small, round, dark green, toothed leaves. Numerous, outward facing, lilac-blue, bell-shaped, single flowers are borne on short stalks sitting just above its foliage providing a long flowering display in summer

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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)

Botanical details

Family: Campanulaceae
Native to the UK: No
Foliage: Evergreen
Habit: Matforming
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 rock gardens and well-drained flower borders in full sun or partial shade avoiding wet conditions in winter. A semi-shade position will ensure the best flower colour is preserved.

Propagation

Propagate by seed and by basal cuttings in spring

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Gravel garden
Rock garden
Patio and container plants
Wildlife gardens
Flower borders and beds
Garden edging
Ground cover

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

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

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