Does bougainvillea bloom in winter
Known as the "proud son of the South", bougainvillea is favored by gardening enthusiasts for its colorful bracts and long flowering period. Whenever winter comes, many flower friends are curious: Can this passionate tropical plant bloom in the low-temperature season? This article will systematically explain the winter flowering characteristics of Bougainvillea and scientific maintenance methods after flowering. The flowering characteristics of bougainvillea in winter and spring. The flowering pattern of bougainvillea is native to tropical South America, and its natural flowering period is concentrated from October to June of the following year. In southern China, plants cultivated in the open field can continue to bloom for more than 200 days, especially in warm areas such as Hainan and Guangdong and Guangxi, where the scene of blooming in winter is spectacular. Mechanism of the effect of temperature on flowering When the temperature stabilizes above 15℃, bougainvillea can bloom normally. If the northern region maintains a warm indoor environment of 18-25 ° C and combines it with 6 hours of daily light, winter flowering can also be achieved. Studies have shown that sustained low temperatures (<10℃) can hinder flower bud differentiation. The difference between the north and south regions shows that South China can achieve open-air winter flowering, the Yangtze River Basin needs to be moved into solar rooms for maintenance, and the northern heating area can maintain flowering through artificial light replenishment. There are significant differences in cold tolerance among different varieties, among which the purple-colored varieties are more tolerant to low temperatures than the safflower varieties. Technical points for precise pruning of scientific post-flowering maintenance system should be carried out immediately after flowering: keep 2-3 bud nodes and cut off the branches, cross branches and weak branches. It is recommended to use disinfectant scissors, cut obliquely 1 cm above the bud point, and apply Yushang ointment to the incision to prevent infection. Nutrient replenishment strategy Apply nitrogen, phosphorus and potassium balanced slow-release fertilizer (N-P-K=15-15-15) 7 days after flowering, with 20-30 grains per pot. Second-flowering varieties need to be added with potassium dihydrogen phosphate (1:1000), combined with decomposed sheep manure organic fertilizer, to promote flower bud regeneration. The light control plan ensures 4-6 hours of direct light every day, and a light meter is used to ensure that the light intensity is ≥30000lux. In northern winter, full-spectrum plant fill light can be used to replenish light for 2-3 hours a day at a distance of 40cm away from the plant. The water management specification adopts the "see dry, see wet" watering method, and the soil on the surface layer is dried before watering thoroughly. It is recommended to use demineralized water with an EC value of <0.5, and the water temperature is consistent with room temperature. The air humidity is maintained at 50-60%, and can be sprayed regularly to increase humidity.
Through scientific temperature control, precise nutrient supply and standardized maintenance processes, bougainvillea can achieve annual cycle of flowering. By mastering its growth laws, you can enjoy the gorgeous "leaf-flower" landscape even in the cold season.