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Thuja occidentalis 'Smaragd'

Smaragd' Emerald American arborvitae

Smaragd' Emerald American arborvitae



  • Sun
  • Partial shade


3, 4, 5, 6, 7, 8, 9, 10, 11

  • Evergreen
  • Dense foliage
  • Cold Hardy
  • Shelter for birds
  • Dense foliage

The 'Smaragd' thuja (Thuja occidentalis 'Smaragd'), also known as the emerald thuja, is a remarkably beautiful evergreen conifer that will add a touch of elegance and greenery to your garden all year round. This compact columnar conifer reaches a mature height of 4 to 6 meters and offers dense, vibrant emerald green foliage that is sure to turn heads.

Remarkable Features:

  • Emerald Green Foliage: The 'Smaragd' is distinguished by its intense emerald green foliage that retains its vibrant color throughout the year, even in winter.
  • Compact Columnar Form: This conifer features a narrow, compact columnar form, ideal for planting in hedges, borders, or as a vertical accent in your garden.
  • Moderate Growth: The 'Smaragd' grows at a moderate rate, adding about 15 to 20 cm in height per year.
  • Remarkable Adaptability: This conifer adapts to a variety of soils and light conditions, even tolerating occasional drought.
  • Increased Hardiness: The 'Smaragd' is hardy to zone 3, which means it can withstand winter temperatures down to -34°C.

Growing Information for Optimal Growth:

  • Soil: The 'Smaragd' thuja prefers rich, well-drained, and slightly acidic soil. It also tolerates neutral and slightly sandy soils.
  • Light: This conifer thrives in full sun or partial shade.
  • Watering: Regular watering is important, especially during dry periods. Allow the soil to dry slightly between waterings.
  • Pruning: Light pruning is recommended each year to maintain the 'Smaragd's' columnar form and promote healthy growth. Remove dead, diseased, or damaged branches, and prune the main branches to retain the tree's compact shape.

Plant details


61 - 122 cm
90 - 122 cm
335 - 365 cm
24 - 48 in.
36 - 48 in.
132 - 144 in.



  • Pyramidal

Flowering colours:

Plant needs


  • Prefers well-drained soil. Water regularly during dry periods to keep the soil slightly moist
  • especially during hot periods. However
  • it is essential not to let the soil become constantly soggy
  • as excess moisture can lead to root problems.


  • Easy. Pruning should be done in the new growth in late June
  • if necessary.

Soil requirement:

  • Well-drained soil
  • Fresh
  • Deep
  • Moist in times of drought



  • Winter winds


  • Birds


  • Clump
  • Hedge
  • Landscaping
  • Isolated
  • Flowerbeds


  • Evergreen foliage

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