2. Illumination: Osmanthus fragrans likes light, which is a positive flower. During cultivation and maintenance, it should be placed in a well-lit place, and it likes humid air. The pot soil should not be too wet, and the cultivation site should be wet. Insufficient light makes the plant shape messy, leaves longer, leaves thinner, flower buds difficult to transform, and few or no flowers bloom. If the light is insufficient for a long time during the growth period, it should be moved to direct sunlight, and the light intensity should be gradually strengthened to prevent sunburn.
3. Ventilation: In the growth stage, it should be well ventilated, placed reasonably, low in front and high in back, and not too dense. The plants do not interfere with each other, so it is necessary to open the window for ventilation during the daytime during the body sleep stage, otherwise not only the plant shape is messy, but also it is easy to cause defoliation.
4, watering: Osmanthus fragrans basin soil should master the principle of not watering, but pouring it thoroughly. Generally, it should be watered every 3-4 days in spring and autumn, every day in summer at high temperature and every 7-10 days in winter. It should be watered in the morning and evening in summer, and around noon in winter, so that the water temperature is close to the soil temperature, and the root system will not be damaged by sudden cooling and heating. Proper watering should be done in autumn, and the basin soil should be prevented from getting too wet or accumulating water in rainy season.
5. Fertilization: Osmanthus fragrans mainly looks at flowers and should be supplied with sufficient fertilizer. When topping, nitrogen fertilizer can be applied1~ 2 times to promote the growth of branches and leaves; Before flower bud differentiation and flowering, phosphate fertilizer is mainly applied. Before fertilization, the pot soil should be slightly dry, and the soil should be loosened first to facilitate the absorption of fertilizer. Water should be watered once the day after fertilization. If compost or manure is used, it must be completely decomposed before use. The concentration of chemical fertilizer calcium superphosphate should not exceed 2%.
6. Pruning: The plastic pruning of osmanthus fragrans should be carried out after autumn, and the excessive branches on the upper part should be cut off to balance the tree potential. Too dense branches should be thinned, and the weak branches should be removed to concentrate nutrients so as to facilitate flowering. Plastic pruning combined with water and fertilizer management can improve the robust growth of osmanthus bonsai and maintain a beautiful posture.
7. Pot turning: Osmanthus bonsai can be turned over and changed once every 2-3 years. The new pot should be larger to facilitate the growth of osmanthus roots. Combined with turning the pot, cut off some old roots and withered roots, use bamboo sticks to remove some old soil, replace it with loose and fertile new culture soil, and put rotten cake fertilizer as base fertilizer at the bottom of the pot, and the fill must be compacted, which can promote the flourishing of osmanthus flowers.
8. Pest control: Common diseases of Osmanthus fragrans include leaf spot, sooty blotch, algae spot, root rot, iron deficiency, etc., which should be controlled according to the disease situation. Leaf spot, sooty blotch and algae spot can be controlled by spraying 0.5 Bordeaux solution or 5% carbendazim 500 ~1000 times solution; In the prevention and control of root rot, attention should be paid to keeping the soil loose and breathable, and not to accumulate water; If root rot is caused by fungi, the roots can be watered with 200 ~ 300 times of amobam solution. The common pests of osmanthus fragrans include sawfly, whitefly, mite, white scale, yellow thorn moth and so on. Sawflies, whiteflies and mites can be sprayed with 40% dimethoate1500 ~ 3000 times solution, except for the artificial brush. In the first and second generation nymphs, 40% dimethoate 1000 times solution or 40% chlorpyrifos 500 times solution can be sprayed.
In the north, osmanthus bonsai should be placed in a warm sunny place, and it should be properly shaded in summer to avoid direct sunlight. The area north of the Yangtze River must be put indoors for wintering in winter, and it is safe to keep the room temperature at 0 ~ 5℃, and you can go out before and after the next spring.