Platycladus orientalis 'Southport'

RHS Plant Profile
oriental thuja 'Southport'

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Synonyms

Thuja orientalis 'Southport'

Conifers Shrubs

A compact, rounded conifer with sprays of golden-yellow foliage forming dense, vertical layers. Leaves may turn reddish-bronze in winter

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
20–50 years
Max Spread
0.5-1 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline 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
Cupressaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Platycladus is an evergreen tree, conical when young, later becoming irregular in outline, with small scale-like leaves in flat vertical sprays, and small greyish cones with hooked scales
Name Status
Accepted

How to Grow

Cultivation

Grow in moist but well-drained soil. Protect from drying winds especially when young

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Rock garden
  • Patio and container plants
  • Low Maintenance

Pruning

No pruning required

Pests

May be susceptible to scale insects and conifer aphid

Diseases

May be susceptible to a canker