Buxus sempervirens 'Wisley Blue'

RHS Plant Profile
box 'Wisley Blue'

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Position

Full shade, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Size

Time to Maturity
10–20 years

Growing Conditions

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

Position

Full shade Partial shade
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)
H6

Botanical Details

Family
Buxaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Potentially harmful
Harmful if eaten. Wear gloves and other protective equipment when handling
Genus
Buxus can be evergreen shrubs or small trees, with simple, leathery, opposite leaves and clusters of small, pale yellow flowers followed by pale green to brown fruits
Name Status
Unresolved

How to Grow

Cultivation

Grows best in well-drained soil in partial shade; can be scorched by sun and strong winds in dry soils. Susceptible to a number of box problems, see box cultivation

Propagation

Propagate from semi-ripe cuttings in summer

Suggested planting locations and garden types

  • Architectural
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Hedging and screens

Pruning

pruning group 8 in summer, renovation pruning can be carried out in late spring. Use mulch and a general fertiliser after hard pruning, ideal for topiary clipping

Pests

May be susceptible to box tree caterpillar, box sucker, mussel scale and red spider mite

Diseases

May be susceptible to a leaf spot, box blight and, rarely, honey fungus