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Rhododendron scientific name: Rhododendron. Alias: Rhododendron, Rhododendron, Rhododendron, Qingming Flower, Qingming Flower, Sangui, Rhododendron tanguticum, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron, Rhododendron and Rhododendron. However, the differences between them are not constant and cannot be determined by the type of corolla or Generally speaking, however, azalea is a deciduous tree, while rhododendron in Duyingshan is an evergreen tree. Rhododendron is tubular, slightly lipped and usually fragrant. On the other hand, azaleas are bell-shaped. Rhododendron usually has only five prominent stamens, while Rhododendron has 10 (or more). But there is an intermediate type between the two. Rhododendron Ardisia originated in the mountainous areas of Asia and North America, and was cultivated into a cultivated variety through artificial hybridization. The famous rhododendron species in North America is R. arborescens, with white, fragrant and shrubby flowers and a height of 3-6 meters (10-20 feet). This photo was just taken. It is very fiery red, R. calendulaceum, shrub, 0.5 ~ 2 meters high (1.5 ~ 6.5 feet). R.periclyminoides is a shrub with a height of1~ 2m (3 ~ 6.5ft) and pink to white flowers. In addition, there are hundreds of gardening types cultivated from Gandaventure, Saussurea medusa, Buxus macrophylla and Kaempferia kaempferia. Small trees or shrubs with morphological characteristics. The trunk is upright, the leaves are changeable, oval and heart-shaped, but not strip-shaped. Leafy leather or paper can be divided into evergreen, deciduous and semi-evergreen. Flowers are often terminal racemes or corymbose inflorescences. Corolla is obviously funnel-shaped and bell-shaped, with single petals and double petals. It is rich in color, including white, red, pink, purple, purple, blue, red and white, with stripes and spots. Some are fragrant, some are tasteless; The flowering period is1-July, which varies with different varieties. The plant height of potted plants is 30- 100 cm. The capsule is cracked and the seeds are mostly powdery or chaff-like. There are many kinds of rhododendrons, which can be divided into four types according to flowering period and introduction source: Mao Juan, Xia Juan, Dong Juan and Xi Juan. Ornamental Application of Rhododendron Rhododendron is a shade-tolerant plant with beautiful flowers and leaves, which is very suitable for indoor cultivation. The flowering period is long, and bloom is red, colorful and passionate. It is dazzling when placed on indoor short shelves or in the halls of venues, theaters and hotels. After the flowers wither, they are full of green leaves and beautiful foliage plants. Rhododendron branches and leaves are resistant to pruning, and the roots are strange. It is also an excellent bonsai tree material. Azalea can also be planted to decorate the courtyard, or to decorate a single tree, or to plant in pieces. Using azaleas to form hedges, flower beds and flower belts can form the landscape of Xia Wei steamed by clouds. Cultivation and management of Rhododendron hydroponics to keep the pot soil slightly wet. Watering once a day in sunny days during the flowering and budding period from March to June; Prevent water from reflecting mountain red in rainy season, and pour water into the side basin in time. In hot summer, we should water along with drying and spray foliar water to increase humidity. Growth slows down in winter, so reduce watering, usually dry watering. Fertilization is needed in the vigorous growth period and flowering period, and water should be used together with the decomposed rapeseed cake. Trace elements should be supplemented in spring. The soil should be acidic, loose, breathable, well drained and rich in humus. In addition, peat soil, Huangshan mud, cinder, sawdust and other mixed soil can be used. Geographical Distribution Yingshan Yingshanhong is distributed in Macheng City, Hubei Province, Xinyang City, Henan Province and Yunnan Province in China. Macheng is rich in tourism resources of Yingshanhong, which is regarded as its city flower. Therefore, it is known as "April day on earth, seeing cuckoo in Macheng".