There is plenty of light. The stronger the sunshine, the more beautiful the flowers are. On the contrary, if you grow in a dark environment for a long time, you will not open it.
Flowers. The branches and leaves are too dense: the nutrients are scattered and it is not easy to form flower buds. Fertilization: only applying nitrogen fertilizer, lacking phosphorus and potassium fertilizer,
It only grows branches and leaves, not flowers. Bougainvillea is commonly known as bougainvillea and bougainvillea. Known as bougainvillea in ancient times, it is an evergreen climbing or spreading shrub of Jasminum. Originally from Brazil in South America, it has been introduced and cultivated in China for 130 years. At present, it is cultivated in all provinces in the south of the Yangtze River. Bougainvillea bougainvillea is an important export potted flower in Yiliang County, Kunming, and it also has a broad development prospect in tropical areas of Yunnan. Bougainvillea is a good potted flower with many varieties, wide adaptability, strong vitality, rich colors and long flowering period. Bougainvillea is also widely used as hedges, porches and bonsai in gardens. As long as the varieties are selected correctly and managed properly, they can grow and bloom all year round. How to make bougainvillea bloom more and longer?
1. Suitable for the site and suitable for the tree-the correct selection of varieties means choosing varieties suitable for local planting under suitable geographical and climatic conditions. Bougainvillea bougainvillea: It requires low temperature (it can be safely wintered above 3℃), and can be cultivated outdoors in the north subtropical region, and is mostly used as hedges and scaffolding. Bougainvillea: It needs high temperature (above 10℃) to overwinter safely. In the south subtropical zone, it is widely planted outdoors. Suitable for potted plants in different places and cultivated into bonsai. In winter, it is placed in a greenhouse with sufficient light at 10 ~ 12℃. Adjusting the room temperature to 15 ~ 25℃ created conditions for flowering. Hybrid: The growth and overwintering temperature is higher than that of Bougainvillea glabra. Under special circumstances, the favorable small terrain (such as lee facing the sun, facing the sun and leaning against tall buildings) can meet the light and heat requirements of bougainvillea flowering with the help of sunlight reflection or thermal radiation from buildings under the sun. In the northern tropical areas (such as Kunming, Chuxiong and Dali), some precious bougainvillea varieties and hybrid bougainvillea can still bloom luxuriantly.
2. The daily watering of bougainvillea is based on the principle of "wet and dry". On the basis of plant management, proper pruning and fertilization, water should be controlled 50 days before flowering. At first, the leaves and branches wilted and wrinkled slightly without watering for 3 ~ 5 consecutive days, then the canopy was sprayed with water every afternoon, and the watering was resumed on the fifth day of/kloc-0. It can promote the formation of flower buds, and can be properly fertilized after the flower buds grow.
3. Apply more phosphorus and potassium fertilizer to control fertilizer, topdressing phosphorus and potassium compound fertilizer or poultry manure once a month in slow growth period, topdressing cooked cake fertilizer and water once every half a month in vigorous growth period, and adding appropriate amount of ferrous sulfate (to prevent iron deficiency and yellowing of leaves), which can promote flower bud differentiation and be beneficial to flowering.
4. Change pots in time after pruning, and prune appropriately according to the purpose of plant cultivation and growth. The outer branches and leaves in the middle and upper part of bougainvillea plant bloom the most, while the long branches, inner branches and overlapping branches consume more nutrients and bloom less. Therefore, after flowering, the pedicel should be cut off, and the flower branches should be retracted by 1/3, leaving only 2 ~ 3 nodes in the bud to remove the redundant parts and promote the germination of the flowering mother branches. Re-cut long branches, lightly cut side branches, and delete all inner branches (branches that grow into branches) and overlapping branches (overlapping branches that grow up and down) to form a plant shape with good ventilation and light transmission. In addition, more flowering lateral branches can be cultivated by gently cutting off the extended branches (about one-fifth of the length). When the new shoots grow to 6 leaves, remove the core and keep 4 leaves. Repeated coring several times in the growing season can cultivate enough complete flower branches.
5. Chemicals are used to control and spray CCC and paclobutrazol.