Pulmonaria officinalis Cambridge Blue Group

RHS Plant Profile
lungwort Cambridge Blue Group

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Synonyms

Pulmonaria 'Cambridge Blue'
Pulmonaria saccharata Cambridge Blue Group

Plants for pollinators
Herbaceous Perennial
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A clump-forming, semi-evergreen perennial with heart-shaped, white-spotted, mid-green leaves leaves and clusters of funnel-shaped, pink-flushed, blue flowers in early to mid-spring.

Position

Partial shade

Soil Types

Loam, Clay, Chalk, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Partial shade
Aspect
West–facing or East–facing or North–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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Boraginaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Clump forming
Genus
Pulmonaria can be herbaceous or semi-evergreen rhizomatous perennials with terminal clusters of funnel-shaped flowers in late winter or early spring, and often strikingly patterned leaves developing in summer
Name Status
Accepted

How to Grow

Cultivation

For best results grow in moist but well-drained soil, in partial shade.

Propagation

Propagate by division

Suggested planting locations and garden types

  • Cottage and informal garden
  • Wildlife gardens
  • Flower borders and beds
  • Banks and slopes
  • Ground cover
  • Underplanting of roses and shrubs

Pruning

Remove any old faded leaves after flowering if required.

Pests

May be susceptible to slugs and snails early in the season.

Diseases

Generally disease-free