Evergreen azalea needs soil that is constantly moist but never soggy, as the shrub is prone to rot in muddy soil. It is a dense, semi-evergreen azalea that typically grows to 2-3’ tall. © Copyright 2020 Hearst Communications, Inc. Poor drainage inevitably leads to root rot, therefore raised beds/plantings should be considered in heavy clay soils such as those present in much of the St. Louis area. Distribution and habitat:Rhododendron simsiiis native to East Asia, where it grows at altitudes of 500–2700m (1600-9000 feet). The genus Rhododendron comprises various groups of which we specialise in the following:. It is in leaf all year, in flower from April to May. Commonly known as evergreen azalea, Rhododendron indicum is an attractive shrub with shiny, deep green leaves that display a hint of red during the winter. Satsuki (Scientific name: Rhododendron indicum) is an endemic species of Japan and is a cold-tolerant evergreen shrub of the Ericaceae family. Inflorescence 1-2 flowered. This is Rhododendron 'Fragrantissimum' - absolutely spectacular. Evergreen azalea is a dense, naturally shapely plant that requires little pruning. Rhododendron indicum Common Name: Satsuki Azalea. Leaves acquire reddish tints in winter.Genus name comes from the Greek words rhodo meaning rose and dendron meaning tree. Good soil drainage is essential (doesn’t like “wet feet”). Grayanotoxin is also present in the leaves of a rhododendron plant. Deciduous azaleas are the only rhododendrons that do not have scaly leaves. long, 1 ⁄ 4 to 1 ⁄ 2 in. in Flowering plants, Indoor Plants Azalea (Rhododendron simsii) is a shrub that grows to 2 m in height, with 2-3cm long leathery, egg-shaped leaves. It is in leaf all year, in flower in June, and the seeds ripen in August. Evergreen azalea, which thrives in acidic soil with a pH of less than 6.5, benefits from addition of generous quantities of organic matter, such as bark chips or pine needles, at planting time. The soil should dry somewhat between each watering to promote air circulation around the roots, but the roots should never become totally dry. Rhododendron is a genus of shrubs and small to (rarely) large trees, the smallest species growing to 10–100 cm (4–40 in) tall, and the largest, R. protistum var. To keep the shrub tidy and to promote healthy growth, snap off wilted flower clusters regularly throughout the blooming season. Leaves narrowly oval, occasionally somewhat obovate or lanceolate, about 1 in. It is hardy to zone (UK) 7. In St. Louis, site this shrub in protected locations, including along walls and foundations that face south. Although rhododendrons are more spectacular than azaleas, their smaller cousins, azalea hybrids are more popular locally as they are better suited to our climate. The toxin is harmful if a large amount is ingested, however. Each species of rhododendron has a different leaf shape, coloring, texture and size. long, 3⁄16to 3⁄8in. In the wild, rhododendrons range from giants of 20-30 metres to diminutive ground-hugging dwarfs barely a 10cm high. Rhododendron grows in cool climate, on slightly acidic, well-drained soil. across, produced in June in terminal clusters. A healthy plant in the proper environment with proper care should have limited problems, however. Rhododendron indicum Photo source: Rhododendron Species Foundation (ac81-084) Predominant Flower Color: Red : Flower / Truss Description: Broadly funnel shaped, rose-red to scarlet. Flowers one to three in the truss. The Azalea indica ‘Formosa’ grows to between 6 and 8 ft. (1.8 – 2.4 m) and keeps its leaves all year long.The bright vivid colors of this Formosa azalea will add a splash of color when it blooms in early spring. Weren ’ t sure how to ta Description leaves and deciduous ( seasonal ) leaves and deciduous ( )! And again after flowering ends to oblanceolate, slightly toothed leaves ( to 2.5 ” )! 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