Morphological characteristics of Osaka pine: evergreen coniferous tree species, one of the cultivated varieties (varieties) of Japanese five-needle pine, with a bunch of five needles, yellowish leaves, short plants and simple and vigorous posture. The branches and leaves are dense and flat, like a cluster of clouds, although old; Habit of origin: cultivated varieties of Japanese five-needle pine. It is a strong positive tree species and is not tolerant to shade; Strong cold tolerance, avoid heat; Drought resistance, water resistance and moisture resistance. Propagation and cultivation: Propagation by seed, grafting or cutting. When potted plants are used as bonsai, they should be pruned frequently, otherwise the branches will grow in vain. Garden use: This tree species is one of the more precious five-needle pines, which is generally used as bonsai materials, and it is rare for ground growers. Maintenance and management of Osaka pine: (1) Keep sufficient light: Five-needle pine likes sunshine, is cold-resistant, afraid of heat and avoids shade. In hot summer, high temperature is not conducive to its growth. Should be given shade, a little cooling, to facilitate growth. Osaka pine is less resistant to sunlight than common five-needled pine, and more attention should be paid to proper shading in summer. (2) control watering. Five needles pine is drought-resistant and moisture-proof. Proper water conservation can shorten needles, especially in the period from germination to needle shedding. If you water too much, the needles will become longer, and stagnant water will easily cause root rot and death. It is advisable to dry the soil slightly. Of course, watering should be different in different seasons and different periods. (3) Controlled fertilization: Pinus pentaphylla is barren-tolerant, so it is not suitable to apply more fertilizer. Applying more chemical fertilizer or concentrated fertilizer is easy to damage the root system, which is not suitable for fertilization in high temperature season and can cause tree death in severe cases. Controlled fertilization can shorten needles; Fertile needles will become longer, usually in spring, and each fertilization is 1 to 2 times. Potted plants apply less fertilizer in the same year. (4) The basin should be small and shallow: the basin selected by the five-needle pine should be slightly small and shallow, not too large and too deep. Small pots are beneficial to short leaves, while large pots are easy to accumulate water and rot roots. Deep basin can be used for cliff type, and the basin bottom needs to be padded with broken tiles for drainage and ventilation. (5) Planting new plants: When buying Osaka pine pots, we must pay attention to keeping the selected soil balls intact to ensure the survival after planting. Choose acidic sandy soil with good air permeability when planting. Water it once after planting, and then maintain it in an environment without direct sunlight and ventilation. You must wait until the soil is completely dry before watering it again. Usually, a watering can is used to spray water on the leaves and the surrounding area to moisturize. Normal maintenance can be resumed after half a month. Japanese five-needle pine is a tree species with active ecological habits, but it is more shade-tolerant than Korean pine and black pine. I like to grow in places with deep soil, good drainage and suitable humidity, but I can't grow well in wet places. Although it has strong resistance to sea breeze, it is not suitable for sand. The growth rate is slow. Not resistant to transplantation, no matter how big or small the seedlings are, they need to bring soil balls when transplanting. Plastic resistance. The morphological characteristics of evergreen trees are as high as 30m, DBH 1.5m, and the crown is conical. The bark is light gray and smooth when young, orange yellow when old, with irregular scaly peeling and reddish brown endothelium. Annual branchlets are light brown, densely yellowish pilose. Winter buds are oval and yellow-brown. Leaves are thin and short, 5 needles in a bunch, 3 ~ 6 cm long, clustered with blue-green branches, with white stomatal lines on both sides of the inside, blunt and round head, fine serrated edges and 2 resin channels, and live on branches for 3 ~ 4 years. The cone is ovoid or oval, 4.0 ~ 7.5 cm long and 3.0 ~ 4.5 cm in diameter, and it is light brown when mature. To propagate by sowing or grafting. Garden use is best matched with rockery, peony, rhododendron, plum blossom and red maple.