Sciadopitys verticillata
Sciadopitys verticillata
Sciadopitys verticillata
Sciadopitys verticillata
Japanese Umbrella Pine
Unique, but it requires patience: 10 cm (4in) per year!
Anne, 07/05/2020
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Description
The Japanese umbrella pine, also known as Sciadopitythis verticillata or Koyamaki, is a unique and remarkable conifer that is the last living representative of its genus and family. Its long light green needles are arranged in a cluster around the branch, which is what makes it unique.
The Japanese umbrella pine is an endemic species of Japan and belongs to the family Sciadopityaceae. The Koyamaki has a pyramidal and dense shape, reaching heights of up to 30 metres (98 feet) in Japan, but in Europe its size will be much more modest, rarely exceeding 15 metres (49 feet) in height, which is also due to its very slow growth rate of only 15cm (6in) per year. Its spread can reach up to 10 metres (33 feet) for mature specimens. Its leaves are long, persistent light green needles arranged in whorls, meaning in a circle around the branch. The bark is thick and dark, resembling that of a Sequoia. The fruit is a small cone characteristic of pines. There are many dwarf selections of Sciadopytis in Japan.
Plant the Japanese umbrella pine in deep, cool, acidic soil that is not calcareous, it particularly appreciates rich and humus-rich soil. It should be planted in a semi-shaded area in the hottest regions and in full sun in cooler regions, always protected from the wind. A humid climate is favorable, as Koyamaki does not tolerate drought. However, it is hardy down to -20°C (1°F).
The Japanese umbrella pine is cultivated as a standalone ornamental tree or in a rock garden, and it integrates particularly well in a Japanese garden, for example as a pruned and trained Niwaki. It is ideal for small gardens and can also be grown in a large pot due to its slow growth. Combine it with heathers and perennials, bulbs, or near Japanese maples with red or purple foliage to contrast with the colors and shape of the leaves.
The presence of this tree is common around Mount Koya in Japan, hence the name Koyamaki. As its wood is resistant to humidity, it was used in boat construction in Japan.
Sciadopitys verticillata in pictures
Plant habit
Foliage
Botanical data
Sciadopitys
verticillata
Pinaceae
Japanese Umbrella Pine
East Asia
Planting and care
Sciadopitys verticillata is planted from September to November and from February to June in well-drained soil, rather poor, with a tendency to be limestone or rich in silica (sand) as is often the case by the sea. It is not demanding on the nature of the soil, and adapts equally well to a deep and fresh soil, if it is properly drained and not too clayey, as it does to a stony soil. Choose a sunny or semi-shaded location depending on your region. Do not disturb it, its root system needs to firmly anchor itself in the soil to withstand both drought and wind. Soak the clods well before planting. Stake your young Japanese umbrella pine, water it regularly to help it establish, especially in summer, during the first 2 or 3 years. Add organic amendment at planting (crushed horn, Or brun...) Optionally, every year in April, apply a special conifer fertilizer and weed the soil in summer. Pruning is not necessary, except to shape the tree or remove branches that die at the base of the trunk as it grows.
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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