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thuja occidentalis smaragd height

If you’re considering Thuja occidentalis ‘Smaragd’—also known as Emerald Green Cedar or Green Arborvitae—for your garden or landscaping project in New Zealand, it’s important to know about the typical growth and height of this popular conifer. This variety is admired for its upright, tidy form, vibrant green foliage, and reliability as a privacy screen or specimen tree. Understanding the mature size and growth potential will help you plan hedges, screens, and feature plantings to perfection.

Thuja occidentalis 'Smaragd' (Green Cedar)

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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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How Tall Does Thuja occidentalis ‘Smaragd’ Grow?

The Thuja occidentalis ‘Smaragd’ height at maturity is one of its most appealing features. In New Zealand gardens, this slow-growing evergreen typically reaches between 3 to 4 metres tall and 75 centimetres to 1 metre wide over 10 to 15 years. Its naturally conical shape means it rarely needs pruning to maintain its tidy, formal silhouette.

If you’re seeking a living screen or attractive boundary that won’t overtake smaller spaces, the manageable Thuja occidentalis ‘Smaragd’ height makes it a top choice. It’s also a fantastic low-maintenance alternative to faster-growing, larger conifers for gardens where space is at a premium.

Planting and Spacing for Best Results

When planning a hedge, plant your ‘Smaragd’ thujas about 60 to 90 centimetres apart. This ensures each tree has enough space to reach its optimum height and spread, forming a dense, lush barrier. They thrive in well-drained soils and both full sun or partial shade, although you’ll see the best colour and compact growth in sunnier spots.

Comparisons to Other Thuja Varieties

If you’re weighing your options for hedging conifers, it’s helpful to compare the Thuja occidentalis ‘Smaragd’ height with other popular arborvitae and conifers:

Alternatives for Structure and Colour

In addition to Thujas, there are many excellent conifers for contrasting form and colour in your garden design. Consider the rich gold foliage of Cupressocyparis Castlewellan Gold, the striking blue tones of Cupressus Blue Ice (Blue Arizona Cypress), the classic conical shape of Picea abies Pyramidalis, or the graceful weeping habit of Cedrus deodara.

Summary

In summary, the Thuja occidentalis ‘Smaragd’ height makes it ideal for urban hedging, driveway borders, or neat specimen planting in New Zealand landscapes. Its combination of vibrant colour, compact growth, and minimal maintenance ensures year-round beauty in any garden. For those seeking more options, our range of conifers includes everything from sky-scraping giants to golden-hued shrubs, helping you create the perfect green sanctuary at home.


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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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