Picea mariana 'Nana'

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dwarf black spruce

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Conifers Shrubs
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A slow-growing evergreen conifer making a dwarf shrub of dense rounded habit, with grey-green, needle-like foliage

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
10–20 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–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)
H7

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Pinaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Picea are evergreen trees with rigid, needle-like leaves arranged singly all round the shoots, and narrow, leathery-scaled cones borne near the ends of the shoots
Name Status
Accepted

How to Grow

Cultivation

Grows best in moist but well-drained acidic soil but will tolerate some alkalinity. See conifer cultivation for more advice

Propagation

Propagate by seed sown in containers in a cold frame in spring or grafting in winter. Hardwood cuttings can be taken in late summer

Suggested planting locations and garden types

  • Architectural
  • Cottage and informal garden
  • Patio and container plants
  • City and courtyard gardens
  • Rock garden
  • Low Maintenance
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to adelgids, red spider mite and conifer aphid

Diseases

May be susceptible to honey fungus