Calluna vulgaris 'Mrs Ronald Gray'

RHS Plant Profile
heather 'Mrs Ronald Gray'

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Shrubs

A hardy, evergreen shrub with a flat and twiggy habit that can be walked on as it grows to less than 10cm in height. It has an approximate spread of between 31-45cm and has dark green foliage and mauve flowers from summer through to autumn.

Position

Full sun

Soil Types

Clay, 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

Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid

Position

Full sun
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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Ericaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Matforming
Genus
Calluna are low-growing or dwarf evergreen shrubs with stems clothed in tiny overlapping leaves, and terminal, spike-like racemes of small, 4-petalled flowers with coloured calyces
Name Status
Accepted

How to Grow

Cultivation

Grow in well-drained, acidic soil in full sun. See Hardy heathers for further advice

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Coastal
  • Low Maintenance
  • Banks and slopes
  • Flower borders and beds

Pruning

Pruning group 10

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus (rarely) and other fungal diseases