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thuja emerald

Thuja emerald, also known as Thuja occidentalis 'Smaragd', is a popular choice for gardeners all around New Zealand looking for a vibrant, evergreen conifer that brings elegance and structure to landscapes year-round. Renowned for its slender, columnar shape and striking bright green foliage, thuja emerald is prized for creating stunning hedges, privacy screens, and specimen plantings. The plant’s dense, upright growth makes it ideal for both residential and commercial gardens, providing year-round colour and a neat, manicured look with minimal maintenance.

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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Key Features of Thuja Emerald

Thuja emerald stands out due to its lush, emerald-green foliage, which holds its vibrant colour throughout the seasons—even during winter. This cultivar typically grows to 3–5 metres, making it perfect for screening and wind protection without overpowering smaller gardens. Its compact, non-spreading form means it fits beautifully into narrow spaces or along pathways, making it suitable for suburban properties. The soft, aromatic needles and tightly packed branches not only offer visual appeal but also create a gentle barrier from noise and wind, making your outdoor spaces more tranquil.

Ideal Uses in New Zealand Gardens

Thuja emerald is sought-after for its versatility. Whether you’re aiming to plant a living hedge, define garden borders, or simply introduce a low-maintenance focal point, the emerald is a proven performer. For those wanting a formal garden, plant thuja emerald in a row for a crisp, tailored look. Its tidy growth also makes it well-suited for topiary, and the plant can be shaped into geometric forms or left untrimmed for a natural appearance. Pairing with other conifers such as Thuja occidentalis 'Pyramidalis' or Thuja 'Green Giant' adds visual interest and diversity to your landscape.

Growing and Care Tips

Thuja emerald thrives in a range of New Zealand climates, from Northland to the South Island. Plant in well-drained soil where it receives full sun or partial shade. Regular watering is crucial for young plants, but once established it is drought tolerant. Annual pruning is recommended to maintain a uniform shape, though this cultivar responds well to light trimming and won’t become unruly. For superior results, mulch around the base—it helps maintain consistent soil moisture and deters weeds. Consider companion plants such as Thuja plicata for added texture, or opt for a golden accent with Thuja plicata Old Gold (Thuja Old Gold).

Other Beautiful Conifers to Explore

If you’re searching for a wider selection, browse our range including Thuja occidentalis 'Rheingold' for warm, golden foliage, Cupressus sempervirens (Pencil Cypress) for Mediterranean style, or Cupressocyparis Naylors Blue and Cupressus Sky Tower for striking blue tones and architectural impact. For smaller spaces, Abies lasiocarpa Green Globe (Rocky Mountain Fir) and Cryptomeria japonica Monstrosa Nana offer compact options with unique forms and textures.

Creating the Perfect Hedge or Focal Point

Thuja emerald is an ideal choice for a lush, easy-care hedge or a stately specimen. Its resilient nature, classic appearance, and adaptability to New Zealand growing conditions make it a smart investment for gardeners of all experience levels. Whether you’re after privacy, wind protection, or a splash of lasting green, thuja emerald delivers dependable performance every season.


Contact us

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 spotlight often lands on Corokia 'Mangatangi' and Avocado 'Reed', but Platanus Ace of Clubs, Liriope 'Monroe White', and Sophora fulvida deserve a standing ovation too.
–The Plant Company

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