Thuja orientalis (lat.Thuja orientalis) is an evergreen coniferous tree of the Cypress family. Comes from western China, northeastern Japan, Korea. Distributed in mixed forests of China, Japan, in the east of Russia, in Ukraine. In natural conditions, it lives for more than 1000 years, in culture - 150-200 years.
Reaches a height of 10-18 m, crown diameter - 8-11 m. Needles 1-3 mm long, green-yellow or light green in summer, turns brown in winter and turns reddish-brown.
Another name for the eastern thuja is Biota or the tree of life. Its seeds and leaves are used as medicinal raw materials, the tree secretes phytoncides that cleanse the surrounding air from pathogens.
Eastern thuja has several forms: tall, stunted and dwarf. The tall form can be used to create alleys, landscape gardening groups, the undersized one - for curbs, hedges, and the dwarf one will look good in rockeries and small gardens.
Other names for eastern thuja: Eastern biota (Biota orientalis), Platycladus orientalis or Platycladus orientalis
Thuja orientalis Justynka (Thuja orientalis Justynka) is a dwarf variety of Polish selection, reaching 1 meter at the age of 10. The annual growth is 8-10 cm. The shape is columnar, the shoots are fan-shaped, delicate, dark green in color, densely located. Undemanding to soil and moisture. It is used in small gardens, rock gardens.
Thuja orientalis Aurea Nana (Thuja orientalis Aurea Nana) is a very decorative variety with golden yellow leaves. Slow-growing, at the age of 10 it grows to 0.8-1 m. Annual growth is 8-10 cm. The shape is conical or ovoid. Undemanding to the soil, but not hardy, young plantings require shelter for the winter. Not recommended for landing in cold lowlands, sunny, sheltered places are preferred.
Purchase of seedlings. When choosing thuja seedlings, the general rules for conifers apply: the roots should not be bare, but in a damp earthen coma or in a container; needles and shoots should be healthy. You also need to take into account the climatic conditions of the landing area: the eastern thuja is not frost-resistant.
Location and landing. The flat plant is more shade-tolerant than the common thuja, but it develops better in open, sunny places. In the shade, it may not form a normal crown. Thermophilic, prefers light, calcareous soils. It develops poorly on excessively moist and too dense soils. More salt-tolerant than western thuja. Adult plants are drought tolerant.
It is recommended to plant seedlings with an open root system (dug out from the nursery field) from the second decade of March to the second decade of April, seedlings with a closed root system (in a container) - from early spring to late summer. No special soil is needed for planting, ordinary black soil is suitable, it is useful to pour 5-7 cm of mulch into the near-stem circle.
Watering. Eastern thuja is quite drought-resistant, but transplanted plants must be watered once a week during the first two months after planting. It is also recommended to regularly water dwarf species. In the summer, it is useful to arrange sprinkling once a week.
Loosening, mulching. Sawdust, peat with a layer of 5-7 cm are used as mulch. If the soil is too dense, it must be periodically loosened. The loosening depth should not exceed 8-10 cm.
Top dressing. If complex fertilizer was applied during planting, then the thuja should be fed only after 2 years with Kemiroi-universal at the rate of 80-100 g per sq. M. Fertilizer is applied in spring, during the growing season. Before winter, it is impossible to feed so that the young shoots growing into growth do not freeze.
Trimming and shaping. Spring pruning of bushes in hedges should be done in moderation - no more than a third of the shoot. It is necessary to remove dry, broken off and diseased branches from the crown.
Reproduction and grafting. Seed propagation is most effective. For this, 2-3 year old ripe cones are selected. Vegetative propagation is also practiced: by cuttings and layering.
Diseases and pests. Eastern thuja, unlike other conifers, is quite resistant to diseases and pests. Occasionally it can be affected by aphids and fungal diseases. Anti-fungus measures: treatment with foundation (10 g per 10 liters of water). Re-processing is carried out after 2 weeks.
Plants in winter. Eastern thuja has a relative frost resistance, young plants need shelter with spruce branches. Also dangerous is the spring sun, which can cause burns on the needles. The shelter can be removed in April.
PHOTO: Thuja eastern