You should be talking about bougainvillea, bougainvillea, clover, Maobaojin, azalea, bougainvillea, Lobelia chinensis, Lobelia chinensis are all vines with high branching rate. In order to keep their beautiful tree shape, they need to be trimmed and reshaped frequently. Generally, it can be trimmed twice a year. Once, combined with changing pots, cut off dense branches, twigs, pests and diseases, and long branches from the base. Keep the branches and cut off the tops. The other time is to properly thin branches after flowering and before new branches grow out, cut off dead branches, over-dense branches and inner branches, and only cut off part of the top of horizontal branches to maintain the symmetry of the building. During the growth of new branches, the tops should be cut off in time to promote more new branches, thus forming more flower buds and ensuring vigorous flowering every year. After repeated pruning, multiple dense flowers can be formed; Elegant round-headed crown. After growing for 5-6 years, it needs to be shortened (only 2-3 buds are left at the base of each branch) or updated. Leaf flowers can also be trimmed to make a "beat", that is, bamboo pieces or lead wires are used to make a rectangular skeleton on the basin. After straightening the flower branches, they are tied to them with a string to avoid exposing the skeleton.

Lobelia chinensis is native to Brazil in South America. Deciduous leaves often appear during cultivation. The main reasons for the defoliation of bougainvillea are as follows: (1) bougainvillea is a strong positive plant and likes sunshine. If placed in a cool environment, it is easy to cause defoliation. (2) Insufficient water supply in hot season or excessive watering in winter is easy to cause defoliation. Therefore, we should pay attention to proper watering as much as possible. (3) Yehuahua likes warm and humid climate, and the optimum growth temperature is between 20℃ and 30℃. If the room temperature in winter is lower than 12℃ or rises and falls, some leaves are easy to fall off. (4) Applying immature organic fertilizer or excessive liquid fertilizer is easy to cause root damage, resulting in scorched leaves and even the whole plant dying. Therefore, it is necessary to apply fully decomposed fertilizer and adopt the method of "thin fertilizer and diligent application".