Cyananthus microphyllus

RHS Plant Profile
small-leaved bluebell-flower

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Synonyms

Cyananthus integer misapplied

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A prostrate herbaceous perennial forming a mat of wiry stems with tiny ovate leaves and solitary, terminal, violet-blue, funnel-shaped flowers 2.5cm wide opening in late summer

Position

Partial shade

Soil Types

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

Loam Sand
Moisture
Moist but well–drained
pH
Acid or Neutral

Position

Partial shade
Aspect
West–facing or East–facing or South–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
Matforming
Genus
Cyananthus are mat-forming herbaceous perennials with small, entire or lobed leaves and solitary, terminal blue, purple, yellow or white flowers which are funnel-shaped with 5 spreading rounded lobes
Name Status
Correct
Plant Range
N India, Nepal

How to Grow

Cultivation

Prefers poor to moderately fertile, humus-rich, moist, but well-drained soil in partial shade.

Propagation

Propagate by seed sown in containers in an open cold frame as soon as ripe, or from softwood cuttings in late spring or summer

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Flower borders and beds
  • Banks and slopes

Pruning

Cut back old flowering stems as they fade

Pests

Susceptible to glasshouse red spider mite and aphids when grown under glass

Diseases

Generally disease-free