• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Microbiota decussata

Russian arbor-vitae

AGM plants

AGM plants have been through a rigorous trial and assessment programme. They are:

  • Excellent for ordinary use in appropriate conditions
  • Available to buy
  • Of good constitution
  • Essentially stable in form & colour
  • Reasonably resistant to pests & diseases
  • Other common names Russian arbor-vitae
    Siberian carpet cypress

  • Family Cupressaceae

  • Genus Microbiota are low-growing or prostrate evergreen coniferous shrubs with tiny triangular green scale-like leaves becoming bronze in winter; flowers and cones are small and inconspicuous

  • Details M. decussata is a prostrate, evergreen shrubby conifer making a wide, dense mat, with small scale-like leaves turning bronze-purple in winter. Flowers inconspicuous, fruit berry-like, yellow-brown, 3mm in length

  • Plant range E Siberia

Characteristics

  • Foliage Evergreen

  • Habit Mat forming

  • 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

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Chalk

    Chalk

  • Loam

    Loam

  • Sand

    Sand

  • Clay

    Clay

  • MoistureMoist but well-drained

  • SoilChalk, Loam, Sand, Clay

  • pHNeutral, Acid, Alkaline

Size

  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 1-1.5 metres

  • Time to ultimate height 10-20 years

How to grow

Cultivation Grows well in most moderately fertile soils in full sun. Useful in the shrub border, the leaves turn bronze in winter sometimes giving the impression that the plant has died

Propagation Propagate by seed sown in a seedbed in autumn or by semi-hardwood cuttings in summer

Suggested planting locations and garden types Banks and Slopes Flower borders and beds Low Maintenance Ground Cover City & Courtyard Gardens Cottage & Informal Garden Rock Garden

How to care

Pruning No pruning required

Pests Generally pest free

Diseases Generally disease free

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