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smaragd thuja

Looking for an elegant, low-maintenance evergreen to enhance your New Zealand garden? The smaragd thuja (Thuja occidentalis 'Smaragd'), also known as Green Cedar or Green Arborvitae, is a top choice for hedging, screening, and formal landscapes. With its naturally tight, upright pyramidal shape and vibrant emerald-green foliage that holds colour beautifully year-round, smaragd thuja creates a lush, private boundary or a striking feature planting—all with minimal care.

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 Smaragd Thuja for Your Garden?

Smaragd thuja stands out for its neat compact form, making it ideal for both small urban sections and large properties. Unlike many conifers, it rarely requires pruning to maintain its shape, reaching around 3-4 metres when mature. Its versatility shines in hedges, specimen plantings, or container gardens. These hardy conifers are resistant to common pests and tolerate New Zealand’s variable climates, from frosty southern regions to humid northland.

Smaragd Thuja Care and Planting Tips

Smaragd thuja thrives in full sun or light shade and in well-drained soils. For hedges, plant each thuja about 60-80 cm apart to achieve a dense, uniform screen. Water deeply through the first growing season while roots establish, then enjoy its drought tolerance as it matures. While not demanding, a layer of mulch will help retain moisture and suppress weeds.

Feed your smaragd thuja with a balanced slow-release fertiliser in early spring. Minimal pruning is needed; simply trim stray branches to retain sharp lines in formal hedges. Regularly remove any debris at the base to promote healthy air flow.

Design Ideas and Plant Combinations

For a stunning textural contrast, pair smaragd thuja with blue-toned conifers like Chamaecyparis lawsoniana Pembury Blue or silvery Picea pungens. Design a layered screen by mixing in feathery Tsuga heterophylla (Western Hemlock) or the bold, architectural presence of Cedrus atlantica.

If you’re after more thuja varieties, consider the stately Thuja occidentalis 'Pyramidalis' or fast-growing Thuja 'Green Giant'. For golden foliage accents, look to Thuja plicata Old Gold (Thuja Old Gold) or the soft, yellow hues of Thuja occidentalis 'Rheingold'. Expanding your conifer palette? Add the unique silver-blue tones of Juniperus scopulorum 'Gray Gleam' or the lush green columns of Thuja plicata.

Where to Plant Smaragd Thuja

Perfect as a hedge along boundaries, a windbreak for exposed sites, or as feature specimens anchoring mixed borders, smaragd thuja adapts to various landscape styles. It’s equally at home in formal gardens, cottage plantings, and contemporary cityscapes.

If you’re seeking an evergreen privacy solution or a classic conifer that brings structure and lasting colour, smaragd thuja is a superb investment. Explore our full selection of conifers to create the perfect living backdrop for your outdoor space.


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Whether you need assistance finding the plant you’re looking for or you simply want to know more about who we are and what we do, we invite you to get in touch with us today. A member of The Plant Company team will get back in touch as soon as possible.

–The Plant Company

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