Calluna vulgaris 'Mullach Mor'

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heather 'Mullach Mor'

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heather 'Mullach Mor' RHS / Joanna Kossak
heather 'Mullach Mor' RHS / Joanna Kossak
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Shrubs

A low-growing, spreading cultivar to 15cm tall and 60cm wide with mid-green foliage and white flowers in long, narrow spikes from summer into autumn

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
5–10 years
Max Spread
0.5-1 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

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
Bushy
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 a well-drained, neutral or acidic soil in full sun. See hardy heathers for further advice

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • Patio and container plants
  • Rock garden
  • Low Maintenance
  • Banks and slopes
  • Flower borders and beds
  • Ground cover

Pruning

Pruning group 10

Pests

Generally pest-free

Diseases

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