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thuja occidentalis emerald

Thuja occidentalis emerald, sometimes known as Thuja 'Smaragd', Green Cedar, or Emerald Green Arborvitae, is celebrated across New Zealand gardens for its glossy, vibrant, evergreen foliage and elegant, columnar form. A member of the cypress family, this hardy conifer quickly earns its place in a variety of garden settings, from formal hedges to stand-alone specimen trees. Valued for its year-round lush foliage and low-maintenance character, Thuja occidentalis emerald is perfect for those seeking structure, privacy, and a touch of vibrant green throughout all seasons.

Thuja occidentalis 'Smaragd' (Green Cedar)

5 from 2 customers

Green Cedar, Emerald Cedar, Green Arborvitae

Thuja 'Smaragd', commonly known as the Green or Emerald Cedar, grows with a narrow, dense, and columnar habit. The foliage is rich green, sometimes tinged bronze in winter, and produced with a somewhat layered effect to give the plant an interesting texture. It typically grows to 7 m in height and 2.5 m in width in full sun. Thuja 'Smaragd' is commonly included in a mixed planting, used as a backdrop for smaller plants, grown for shelter or screening, used for hedging, or planted to line an entranceway or avenue. It is excellent for providing an architectural element and suits being planted against a large, bland wall.

Thuja occidentalis 'Smaragd' hedge with bright green foliage.
  • Suited to regions:
    All regions
  • Plant type:
    Conifers
  • Height:
    7.00 m
  • Spread:
    2.50 m
  • Tolerances:
    Extended dry periods, Hardy
  • Garden uses:
    Containers, Hedging, Screening
  • Garden styles:
    Architectural, Backyard, City & Courtyard, Formal, Frontyard, Modern
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Thuja occidentalis 'Smaragd' (Green Cedar)

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Why Choose Thuja occidentalis emerald for Your Garden?

Thuja occidentalis emerald is favoured for its dense, upright growth, reaching about 3 to 4 metres tall and staying just under a metre wide. Unlike some conifers, its foliage holds a bright, rich green hue during winter as well as summer, keeping gardens looking fresh when many other plants fade. This variety is particularly wind-tolerant and thrives in both full sun and part shade, making it a reliable choice for a variety of New Zealand climates and landscapes.

Planting and Care Tips

Plant Thuja occidentalis emerald in well-drained soil with good organic content for best results. When establishing a hedge, space plants roughly 60 cm apart. Water regularly during the first season to encourage deep root development. While it’s a tough and disease-resistant conifer, adding mulch around the base will conserve moisture and keep the root system cool. Light, annual trims in late winter or early spring will maintain its shape and encourage dense growth.

Garden Uses for Thuja occidentalis emerald

This versatile plant is most commonly used for hedging and screening, providing privacy and shelter in a fast and attractive way. Thuja occidentalis emerald is also an elegant focal point as a specimen tree, suitable for formal avenues or potted displays on patios. Its symmetrical, slim profile makes it ideal for creating evergreen structure in mixed borders, or as a reliable backdrop for flowering perennials.

If you’re interested in exploring more conifer options, you might enjoy Thuja occidentalis 'Pyramidalis' for a similarly upright shape, or Thuja occidentalis 'Rheingold' for golden-toned foliage. Gardeners looking for taller or wider hedging options may prefer the vigorous Thuja 'Green Giant' or the robust Thuja plicata.

Pairing with Other Conifers

Thuja occidentalis emerald pairs beautifully with other conifers and evergreens for year-round interest and textural contrast. Consider companion planting with unique varieties such as Abies procera Blaue Hexe, Abies procera Glauca, or the compact Picea glauca Echiniformis. For a low-growing option, Juniperus communis Suecica Nana (Juniperus Suecica Nana) makes an effective groundcover or border plant.

For those with a love of stately evergreens, consider also the majestic Cedrus libani (Cedar Of Lebanon) for a stunning landscape centrepiece.

Thuja occidentalis emerald is a must-have for New Zealand gardeners seeking beauty, privacy, and structure in one easy-care conifer. With its exceptional reliability and aesthetic appeal, it’s no wonder this emerald gem remains a garden favourite year after year.


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–The Plant Company

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