1, bougainvillea, cultivated in the open field. Choose a sunny clearing or the south of the window sill. There is a great demand for water, especially in midsummer. If the water supply is insufficient, it is easy to defoliate, which directly affects the normal growth of plants or delays flowering. Therefore, watering should be timely in summer and flowering period, and watering can be appropriately reduced after flowering. Keeping the soil too wet during the growing period can also lead to defoliation and root rot. Fertilize once a week during the growing period, and add 2-3 times of phosphate fertilizer during the flowering period. There are many fallen leaves during flowering, so it should be cleaned up in time.

2. After flowering, it is necessary to trim and reshape, remove dead branches and dense branches, strengthen fertilizer and water management, and promote the germination of new branches. After the tree is restored, the flower buds are hydrated by controlling fertilizer and water to achieve the purpose of flowering in all seasons and every year. Growing vigorously, the root system will soon cover the whole basin, so the basin should be changed every 1-2 years, and the bottom fertilizer should be added when changing the basin. Potted soil is a mixture of garden soil, humus soil and sand. After 5-6 years of cultivation, it needs to be cut and updated again.

3. Smiling flowers like fertilizer. Composts such as decomposed cake fertilizer, bone meal, chicken and duck manure and fish intestines are mixed with water and applied once every 15 days in the growing season (April-September), and fertilization is stopped after flowering 10. If the leaves are not bright and dark green, you can fertilize them once. Keep the basin soil moist at ordinary times, but never too wet. Because its roots are fleshy, if it is watered too much or waterlogged after rain, it will become rotten roots, so we should pay attention to controlling humidity in rainy season. During the growing period and before flowering, it needs more water and is watered once a day. In summer, it is necessary to water the leaves in order to maintain a certain air humidity. Because of the short sunshine in autumn and winter, water once or twice a week.