1, location:
Potted osmanthus trees should be placed in warm and sunny places, and should be properly shaded in summer to avoid direct sunlight. The area north of the Yangtze River must be kept indoors in winter, and it is safer to keep the room temperature at 0-5℃. You can leave the house next spring.
2. Water:
Potted soil should master the principle of not watering and pouring thoroughly. Generally, it is watered once every 3-4 days in spring and autumn, once every day in summer and once every 7- 10 day in winter. Water 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 roots will not be damaged by sudden cooling and heating. Water properly in autumn, and prevent the basin soil from getting too wet or accumulating water in rainy season.
3, fertilization:
Osmanthus fragrans is mainly for flower viewing, and sufficient fertilizer should be supplied. Nitrogen fertilizer can be applied 1-2 times when topping to promote the growth of branches and leaves; Before flower bud differentiation and flowering, phosphate fertilizer is mainly applied. After osmanthus moved to the open air in spring, it began to water with rotten and thin bean cakes. Sesame sauce, fishy water, etc. Once every half a month, once a week from the end of May to before flowering, the concentration of fertilizer and water gradually increases, and 0.5% potassium dihydrogen phosphate solution is topdressing every half a month from July to August. Apply light fertilizer solution after flowering to avoid autumn branches. Apply more organic fertilizer and phosphorus and potassium fertilizer in winter. Generally, 25-30g of cake fertilizer, 65,438+00-65,438+05g of potassium dihydrogen phosphate are applied to the roots every 65,438+05-20 days, and then 2-3kg is mixed with clean water, and then sprayed every 65,438+00-65,438 days. 600 times of high-efficiency biological phosphorus and potassium fertilizer mixture, evenly spraying all branches and leaves, and starting drip is appropriate. Before fertilization, the pot soil should be slightly dry, and the soil should be loosened first to facilitate the absorption of fertilizer. Water it once the next day after fertilization. If compost or manure is used, it must be completely decomposed before it can be used (the sign is that the manure juice is black). The concentration of superphosphate in chemical fertilizer shall not exceed 2%, and the concentration of urea shall be 0.5- 1.0%.
4, pour the basin:
Potted osmanthus should be changed every 2-3 years. Cut off some old roots and withered roots, and remove some old soil with bamboo sticks. Spread a layer of river sand or vermiculite at the bottom of the basin to facilitate ventilation and drainage, put decomposed cake fertilizer at the bottom of the basin as the base fertilizer, and the fill must be compacted to promote the flourishing of osmanthus fragrans. The proportion of soil for hanging flowers in potted plants is not strict, and it can usually be composed of garden soil, manure pile and river sand, each accounting for 1/3. If the acidity is too high, you can add some lime powder or plant ash; If the alkalinity is too heavy, some aluminum sulfate or ferrous sulfate can be added. In spring, after planting osmanthus fragrans in pot, it should be watered enough to make it permeable, and then moved to the shade for about 10 days to make it "serve the pot". Fertilization is not allowed during pot service. Water and fertilizer can only be applied after the growth has resumed and new leaves have grown. The flowerpot is made of purple or ochre, which can be in sharp contrast with the colors of flowers and leaves to increase its ornamental effect.
5. Finishing and shaping:
Pruning of potted osmanthus trees should be carried out after autumn, and the upper branches should be cut off to balance the tree potential. Too dense branches should be thinned, weak branches should be removed, and nutrients should be concentrated to facilitate flowering. Plastic pruning combined with water and fertilizer management can improve the robust growth of bonsai and maintain a beautiful posture.