Ceratostigma 'Autumn Blue'

RHS Plant Profile
leadwort 'Autumn Blue'

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Synonyms

Ceratostigma plumbaginoides 'Autumn Blue'

Herbaceous Perennial
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Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
West–facing or South–facing or East–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
Plumbaginaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Spreading branched, Suckering, Matforming
Genus
Ceratostigma can be evergreen or deciduous shrubs or herbaceous perennials, with simple leaves which usually colour well in autumn, and short terminal or axillary spikes of salver-shaped blue flowers in late summer and autumn
Name Status
Unresolved

How to Grow

Cultivation

Grow in moderately fertile, moist but well-drained soil. Best in full sun.

Propagation

Propagate by softwood cuttings in spring or semi-ripe cuttings in early summer. Spring is the ideal time to Divide plants.

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Flower borders and beds

Pruning

Shear over plant in spring to remove old flowered stems

Pests

Generally pest-free

Diseases

Generally disease-free, but may be susceptible to Powdery mildews