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Rhododendron indicum


Rhododendron indicum (L.) Sweet

Family Name: Ericaceae
Synonyms: Azalea burgeri, Azalea indica
Common Name: Macranthum Azalea, Azalia, Indica Azalea, 皋月杜鹃


Family Name
Genus Epithet
Species Epithet
Name Authority
Name Status (botanical)
Common Names

Classifications and Characteristics

Plant Division Angiosperms (Flowering Seed Plants)
Plant Growth Form Shrub
Lifespan (in Singapore) Annual
Mode of Nutrition Autotrophic
Maximum Height 1 m to 2 m


Native Distribution Japan
Native Habitat Terrestrial
Preferred Climate Zone Tropical

Description and Ethnobotany

Growth Form Dense shrub, leaves often clustered towards tip of branchlets. It is a semi-evergreen shrub that grow to about 1-2 m tall. 
Roots Root system is shallow and fibrous. 
Foliage Hairy leaves (1.7 cm– 3.8 cm) are lanceolate to oblanceolate with slightly toothed margin.  Upper surface of the leaves are glossy and dark green while the underside of the leaves are paler. 
Flowers Flowers are red and funnel-shaped, about 4 cm long and 5 cm in diameter with broad elliptic lobes. 5 stamens present are shorter than the flower. 
Fruit Fruit is dried, hairy and oblong-ovoid. 

Landscaping Features

Desirable Plant Features Ornamental Flowers
Landscape Uses Parks & Gardens

Fauna, Pollination and Dispersal

Pollination Method(s) Biotic (Fauna)

Plant Care and Propagation

Light Preference Semi-Shade
Water Preference Moderate Water
Rootzone Tolerance Moist Soils, Well-Drained Soils
Potential Problems Susceptible to both pest and disease problems, including but not limited to canker, crown rot, root rot, leaf spot, rust, powdery mildew, aphids, borers, lacebugs, leafhoppers, mealy bugs, mites, nematodes, scale, thrips and whitefly.
Propagation Method Seed, Stem Cutting


Foliage Retention Evergreen
Mature Foliage Colour(s) Green
Mature Foliage Texture(s) Thick
Foliar Shape(s) Non-Palm Foliage (Lanceolate)
Leaf Area Index (LAI) for Green Plot Ratio 4.5 (Shrub & Groundcover - Dicot)

Floral (Angiosperm)

Flower & Plant Sexuality Bisexual Flowers
Flower Colour(s) Pink

Image Repository



Master ID 1094
Species ID 2387
Flora Disclaimer The information in this website has been compiled from reliable sources, such as reference works on medicinal plants. It is not a substitute for medical advice or treatment and NParks does not purport to provide any medical advice. Readers should always consult his/her physician before using or consuming a plant for medicinal purposes.
Species record last updated on: 14 October 2021.