Sciadopitys verticillata

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.