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Cryptomeria japonica is an evergreen conifer known by other names such as sugi, crittomeria or Japanese yew. It is a fairly slow-growing plant, originating in China and Japan; it has a pyramidal crown, erect stem, with dark brown or greyish bark; over the years it tends to take on a candle shape, with slightly hanging branches. The leaves of the cryptomeria are needle-like, light green in color, are arranged in a spiral along all the branches; in autumn and winter they sometimes become bronze colored. The pine cones of sugi plants are small. Plant of notable decorative effect, it is generally used as a single specimen in the parks, specimens that have many decades can reach 20-25 meters in height; there are some varieties of Cryptomeria japonica, also with a dwarf development.
Cryptomeria japonica plants prefer sunny positions, even if sugi develop without problems even in partial shade or in complete shade; these trees do not fear the cold, but it is advisable to avoid planting them in very windy places.
The Japanese yew specimens are also well suited to adverse weather conditions, of course the youngest cryptomeria specimens require more attention and need greater protection from strong winds, which are enemies to the health of this variety of trees.
As for the need for water, it is possible to say that in general the Japanese yew specimens are satisfied with the rains, even if it is advisable to water the cryptomeria trees very young in case of prolonged periods of drought.
Check that the soil is well dry between one watering and another to avoid the formation of water stagnation, a factor that can cause problems or suffering for the Cryptomeria japonica plant.
To obtain healthy and robust sugi plants it is necessary to place the cryptomerie in a very rich soil in organic, loose and deep matter. In general, however, they also develop in normal garden soil.
They are rustic and resistant trees, they manage to adapt even in unfavorable situations, they can present suffering in the case of asphyxiated and undrained soil, which allows the development of water stagnation.
The multiplication of Japanese yew trees usually occurs by seed, in spring; in late summer propagation by cutting can be carried out. It is good to keep the new plants obtained with this process in a sheltered place until they have acquired strength and vigor, so that they can be transplanted to full ground without problems.
Sugi, Crittomeria, Japanese badger - Cryptomeria japonica: Pests and diseases
Sometimes this kind of tree can be hit by a processionary or by the cedar aphid, but generally it proves to be a tree resistant to pests and diseases.
If you notice any signs of attack by parasites for this type of tree, it is necessary to intervene promptly, using broad-spectrum phytosanitary products to be distributed evenly, making sure to check which plants are around and whether they can be disturbed from the treatment. It is also possible to use natural methods, such as garlic or nettle-based preparations, which allow good results to be obtained if distributed properly.