Thuja occidentalis Sunny Smaragd - Eastern White Cedar
Thuja occidentalis Sunny Smaragd - Eastern White Cedar
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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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
Plant habit
Foliage
Botanical data
Thuja
occidentalis
Sunny Smaragd® ('Hoogi023'PBR) EU 51756
Cupressaceae
Eastern White Cedar, Northern White Cedar, American Arborvitae, Eastern Arborvitae
Cultivar or hybrid
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
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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