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Thuja occidentalis Sunny Smaragd - Eastern White Cedar

Thuja occidentalis Sunny Smaragd® ('Hoogi023'PBR) EU 51756
Eastern White Cedar, Northern White Cedar, American Arborvitae, Eastern Arborvitae

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This thuja is distinguished by its bright yellow foliage throughout the year. This conifer forms a golden and upright pyramid that can reach a height of 2 to 2.5m. It can be used as a standalone plant on a lawn, in a flower bed to add height and light, or in a container to decorate a terrace. With its fast growth, it is also suitable for use as a hedge. This easy-to-maintain and hardy bush tolerates full sunlight well.
Height at maturity
2 m
Spread at maturity
90 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -34°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Description

Thuja occidentalis 'Sunny Smaragd' is a narrow, conical Canadian Arborvitae with bright golden yellow, evergreen foliage. This compact golden conifer will brighten up your garden planted individually or in a mass planting, and your terrace, in a large pot. It grows quickly and is suitable for use as a single-species hedge. This hardy and easy to maintain bush thrives in full sun and partial shade in moist, well-drained soil.

From the Cupressaceae family, Thuja occidentalis is native to northeastern North America. It reaches a height of 15 to 20 m, with a naturally conical habit. Its trunk has a highly decorative reddish-brown bark. The Canadian Arborvitae, also known as the Eastern Arborvitae or White Cedar of Canada, has given rise to numerous cultivars selected for their ornamental qualities, such as two golden varieties, 'Golden Smaragd' and 'Sunny Smaragd'. The latter, a recent Dutch creation by Ets Hoogenraad, stands out from the former, a Polish creation by Edward Kubik, with its brighter yellow colour that persists throughout the year, and its faster growth. It forms a dense, upright conifer with a perfect pyramidal shape, reaching a height of 2 to 2.5 m and a width of 1 m after 10 years. Its flattened, short branches are covered with overlapping, golden yellow, scale-like leaves that remain vibrant all year round. They may turn orange in cold weather. This variety thrives in full sun and partial shade, where its foliage remains golden.

Low-maintenance and luminous 'Sunny Smaragd' Western Arborvitae will find its place in any garden. Plant it in a large rock garden, individually in a small garden, or in a mass alongside the David Austin rose 'Malvern Hills' with yellow flowers and the perennial geranium 'Rozanne' with numerous large blue flowers. It performs well in pots and does not brown, making it perfect for your terrace. With its fast growth, it is more suitable for use as a hedge than its close cousin 'Golden Smaragd'.

Thuja occidentalis Sunny Smaragd - Eastern White Cedar in pictures

Thuja occidentalis Sunny Smaragd - Eastern White Cedar (Foliage) Foliage
Thuja occidentalis Sunny Smaragd - Eastern White Cedar (Plant habit) Plant habit

Plant habit

Height at maturity 2 m
Spread at maturity 90 cm
Habit conical, pyramidal
Growth rate fast

Foliage

Foliage persistence Evergreen
Foliage colour golden

Botanical data

Genus

Thuja

Species

occidentalis

Cultivar

Sunny Smaragd® ('Hoogi023'PBR) EU 51756

Family

Cupressaceae

Other common names

Eastern White Cedar, Northern White Cedar, American Arborvitae, Eastern Arborvitae

Origin

Cultivar or hybrid

Product reference22417

Planting and care

Thuja occidentalis 'Sunny Smaragd' is best planted in ordinary, deep, neutral or even slightly chalky, moist and well-drained soil. It dislikes arid or overly wet soils, scorching temperatures and prolonged drought. Choose a sheltered location protected from strong winds and sunny, or partially shaded in hot climates. This golden variety thrives in full sun. You can add compost at planting and water generously in the first few years and prolonged drought. In very poor soil, apply a special conifer fertiliser every spring and weed the soil in summer. Pruning is not necessary. However, if needed, do so in spring, remove dead or broken branches and maintain its compact habit and beautiful conical shape.

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow, Rockery
Type of use Back of border, Free-standing, Container, Hedge
Hardiness Hardy down to -34°C (USDA zone 4) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Moist soil, Ordinary, moist and well-drained soil

Care

Pruning instructions Pruning is not essential. However, if needed, do so in spring, remove dead or broken branches and maintain its habit compact and its beautiful conical silhouette.
Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground

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