Is bougainvillea a type of rhododendron?
In the streets and alleys of southern cities, you can often see gorgeous flowers climbing the walls blooming like fire. This ornamental plant, often mistaken for rhododendrons, is precisely the bougainvillea, nicknamed "Le Rhododendron." As a unique species of the genus Leucia in the Mirabilaceae family, it is fundamentally different from the Rhododendron family, but it also causes cognitive confusion due to its similar growth form. 1. Plant classification and morphological characteristics 1.1 Origin of the name and common misunderstandings The nickname "Le Rhododendron" originates from the Guangdong dialect, and "Le" refers to the prickly branches. Its branches are densely covered with barbed prickles and its leaves are ovoid leathery, in sharp contrast to the tender branches of Rhododendron plants. Most Rhododendron plants grow in acidic soil environments, while Bougainvillea adapt to alkaline substrates. This ecological difference has become an important basis for distinguishing the two. 1.2 Analysis of unique ornamental structure The real flower is a small yellow-green tubular flower, with three conspicuous bracts constituting the main ornamental parts. The bracts are paper-like, arranged in a triangle, and their colors change with the variety, covering the color spectrum such as purplish red, orange yellow, and pure white. This abnormal development of bracts gives it the scientific name of "leaf flower." 2. Cultivation management and growth habits 2.1 The original environment and region adapt to Bougainvillea, which is native to the tropical rainforest of Brazil, can wintering in the open air in areas south of 25° north latitude in my country. The optimal growth temperature is 20-30℃, and cold prevention measures are needed when it is below 5℃ in winter. The demand for light is extremely high, and direct light for 6 hours per day can ensure the normal differentiation of flower buds. 2.2 Substrate selection and water and fertilizer control use a mixed substrate of legular soil: coarse sand: organic fertilizer =4:3:3, which can effectively balance water retention and air permeability. Maintain the watering principle of "seeing dry and wet" during the growth period, and control of water for 20 days before flower bud differentiation can promote flowering. Apply phosphorus-potassium compound fertilizer every month to avoid excessive nitrogen fertilizer causing excessive growth. 2.3 Technical points for modeling and pruning: Re-cutting in early spring to retain 3-4 segments of the main branch, and use aluminum wire traction to create landscape shapes such as arches and styles. Cut off the remaining flower branches in time after flowering and retain the 2-3 buds at the base. Regularly cut dense branches to enhance ventilation and prevent the breeding of scale insects.
As a representative of tropical flowers, bougainvillea can bloom all year round through scientific maintenance and management. Master its sun-loving and drought-tolerant characteristics, and rationally use flower control technology, even if the balcony is planted, you can harvest the visual effect of blooming flowers. This kind of ornamental plant with tenacious vitality is decorating modern urban space with its unique charm.