Bougainvillea likes warm and humid climate and is not cold-resistant. It can overwinter safely above 3℃ and bloom above 65438 05℃. I like plenty of light. It is not strict with soil, grows well in clay loam with good drainage and rich minerals, and is resistant to barren, alkali, drought, water accumulation and pruning. Bougainvillea originated in Brazil, South America, and was introduced to Europe for cultivation in 1930s. Now bougainvillea is cultivated all over China. It likes warm and humid, sunny environment, not cold-resistant. In China, potted plants and greenhouse cultivation are needed in other areas except the south where it can be cultivated in the open field for winter. Sandy loam with good drainage is the most suitable soil. Bougainvillea is often propagated by cutting, which is convenient for seedling raising. In May and June, cut mature lignified branches, 20 cm long, put them in a sand basin, cover them with glass and keep them moist. They can take root in about one month and bloom in two years. The flowering period of the whole plant is very long, which can reach three or four months. There are many fallen flowers and leaves during flowering, which need to be removed in time to keep them fresh and beautiful. Clover is a vine with simple reproduction. Just cut the stem into the soil in early spring or late autumn, and it will take root and sprout and grow branches and leaves in one month. It will blossom in the second year. Its flowering period is very long, usually around January. Bougainvillea has a long flowering period and many beautiful flowers. In the south, the flowering period is usually from 10 of the current year to the beginning of June of the following year. Yezihua has low requirements for soil, but it is afraid of water accumulation and is not tolerant of waterlogging. Therefore, we should choose loose and well-drained culture soil. Generally, 4 parts of humus soil, 4 parts of garden soil and 2 parts of sand can be used as culture soil, or dry pond mud mixed with some coal cake residue can be used as basin soil. "Rational fertilization"

In order to make bougainvillea bloom, it is necessary to ensure adequate nutrients, and at the same time, timely and appropriate fertilization should be used reasonably. Generally, in the vigorous growth period from April to July, liquid fertilizer is applied every 7 days ~ 10 days to promote the healthy growth of plants. The fertilizer can be 10% ~ 20% decomposed bean cake, rapeseed cake water or human manure water. In August, in order to promote flower bud germination, phosphate fertilizer was applied once every 10 day, and 20% liquid fertilizers such as decomposed chicken, duck and pigeon manure and fish offal could be used. The flowering period starts from June 5438+ 10, and from this period to mid-June 5438+065438+ 10, phosphate fertilizer is applied every half month, and the concentration of fertilizer and water is 30% ~ 40%. In the future, topdressing should be done once after each flowering, so that leafy flowers can continuously supplement nutrients during flowering. "controlling water before flowering"

When watering leafy flowers at ordinary times, we should master the principle of "don't water them, but water them thoroughly". However, in order for Yuzryha to blossom neatly and luxuriantly, water control must be carried out before flowering. The watering of bougainvillea has been controlled since September, and each watering should wait until the basin soil is dry and the branches and leaves are soft and drooping. This is repeated for half a month, and normal watering is resumed after half a month. Do not apply fertilizer during water control, so as not to burn the roots with fertilizer. In this way, in a month or so, leafy flowers can germinate and bloom, and the flowers are open and tidy, thriving. Loosening soil, weeding and changing pots

Because of long-term watering, fertilization and rain erosion, the pot soil is easy to harden, so it is necessary to loosen the soil regularly and remove weeds in the pot soil to facilitate the growth of flowers. Otherwise, the basin soil will harden and accumulate water, which will easily lead to root rot or poor growth of Phyllanthus urinaria. In addition, bougainvillea grows rapidly, with developed roots and many fibrous roots, so it is necessary to change pots once a year. "Correct pruning"

Half lotus grows rapidly, so attention should be paid to shaping and pruning during the growth period to promote the growth of lateral branches and bloom more. Pruning times are generally 1 to 3 times, which should not be too much, otherwise it will affect the flowering times. After each flowering, the residual flowers should be removed in time to reduce nutrient consumption. After the flowering period, the over-dense branches, inner branches, long branches and weak branches should be thinned, and other branches are generally not trimmed or only slightly trimmed. Bougainvillea bougainvillea should not be pruned again to shorten the next growth period and promote its early flowering and more flowering. "Pay attention to light and ventilation"

Bougainvillea is a positive plant. In order to make the branches and leaves grow normally and increase the number of flowers, bougainvillea must be placed in a well-lit and well-ventilated place, and let it shine for 8 hours to 12 hours every day. If places are often shaded, plants will grow in vain and the number of flowers will be reduced. If the place is not ventilated or placed too closely between pots, the leaves will fall off, especially in hot summer, when it rains and the temperature is high, it is easy to cause the leaves to fall off in a large area, thus affecting the growth and flowering of plants. "Strengthening pest control"

The common pests of bougainvillea mainly include leaf beetle and aphid, and the common diseases mainly include shoot blight. At ordinary times, we should strengthen loosening soil and weeding, remove dead branches and diseased leaves in time, pay attention to ventilation, and reduce the spread of disease sources. Strengthen the examination of the disease, and if it is found and treated in time, it can be prevented and treated with dimethoate, Tobuzin and other solutions.