Rhododendron arboreum
A Himalayan rhododendron with clusters of red, pink, or white bell-shaped flowers
Rhododendron arboreum is a woody plant that grows as a shrub or small tree, native to the Himalaya and nearby regions. Its large clusters of red, pink, or white flowers appear in early to mid-spring, and it is celebrated as Nepal’s national flower and as a regional emblem in India and Sri Lanka.
- Nepal’s national flower and a regional emblem in India and Sri Lanka
- Grows as a shrub or tree, sometimes reaching 20 meters tall
- Flowers in spring with clusters of red, pink, or white blooms
- A specimen in Nagaland, India, holds a world record for height
- Several subspecies are found across South and Southeast Asia
What does Rhododendron arboreum look like?
This plant can grow as a shrub or reach the size of a small tree, sometimes up to 20 meters tall. Its leaves are broad, dark green, and covered with silvery, fawn, or brown hairs underneath. In spring, it produces dense clusters of 15 to 20 bell-shaped flowers, each about 5 centimeters wide, which can be red, pink, or white. Inside, the flowers have black markings and nectar pouches.
Where does Rhododendron arboreum come from?
Rhododendron arboreum is native to the Himalaya, including regions of Nepal, India, Bhutan, Tibet, and nearby countries. It also grows wild in Myanmar, Sri Lanka, and Thailand. The plant’s name refers to its tree-like growth. Over time, it has become a symbol in several countries, and a specimen in Nagaland, India, was recognized for its exceptional height.
When and how Rhododendron arboreum blooms
This rhododendron blooms in early to mid-spring. It prefers woodland settings with moist, well-drained, acidic soil rich in organic matter, and benefits from shelter against strong winds. The plant is suited to gardens that mimic its natural, shaded mountain habitat. It is usually grown for its decorative flowers and foliage.
How Rhododendron arboreum is used
People value Rhododendron arboreum for its vibrant spring flowers, which are used to decorate gardens and parks. It is a symbol of Nepal and features in state and provincial emblems in India and Sri Lanka. Its presence in gardens is mainly for ornamental purposes, especially in regions with climates similar to its native range.
Kinds of Rhododendron arboreum
There are several subspecies, each found in different areas: one with whitish hairs beneath the leaves in Myanmar, another with cinnamon-brown hairs in the central and eastern Himalaya, one native to the Nilgiri Mountains of southern India, and a rare form in Sri Lanka’s highlands. Each subspecies has adapted to its local environment.
What Rhododendron arboreum means
Rhododendron arboreum holds national status in Nepal and is a state or provincial emblem in parts of India and Sri Lanka. Its striking flowers are a source of pride and identity in these regions. The tallest known specimen, found in Nagaland, India, has been recognized for its size. The plant is also appreciated in gardens for its spring display.
Where Rhododendron arboreum is used and seen
Parc Floral de la SourceA large public garden in Orléans built around the source of the Loiret river
Rhododendron-Park BremenA vast park in Bremen with the world’s largest rhododendron and azalea collection
Botanical Garden of the University of ViennaA historic 8-hectare plant collection next to Vienna’s Belvedere gardens
Kórnik ArboretumPoland’s oldest and largest collection of trees and shrubs, near Kórnik Castle
VanDusen Botanical GardenA public garden in Vancouver with global and native plant collections
Abkhazi GardenA one-acre garden in Victoria, British Columbia, created by Prince and Princess Abkhazi
Holden ArboretumA vast botanical garden and arboretum in Kirtland, Ohio
Parc floral de ParisA botanical garden and flower park in the Bois de Vincennes, ParisWhere to see Rhododendron arboreum
🇮🇳 Lachung · Apr to JunYumthang valley rhododendronsA high valley in north Sikkim where many kinds of rhododendron flower in late spring.
🇮🇳 Darjeeling · Apr to MaySandakphu rhododendron trekA ridge walk along the India and Nepal border through rhododendron and magnolia forest in spring.
🇳🇵 Pokhara · Mar to AprGhorepani rhododendron forest trekA short Annapurna trek through forests of Nepal's national flower, the red tree rhododendron.Questions people ask about Rhododendron arboreum
Where does Rhododendron arboreum come from?
It is native to the Himalaya and nearby regions, including Nepal, India, Bhutan, Tibet, Myanmar, Sri Lanka, and Thailand.
What does the tree rhododendron look like?
It can be a large shrub or small tree with broad, dark green leaves and clusters of bell-shaped flowers in red, pink, or white, each flower marked with black spots inside.
What is Rhododendron arboreum used for?
It is mainly grown for its ornamental flowers in gardens and parks, and it serves as a national or regional symbol in Nepal, India, and Sri Lanka.
Are there different forms of this plant?
Yes, there are several subspecies, each adapted to different regions, such as Myanmar, the Himalaya, the Nilgiri Mountains in India, and the highlands of Sri Lanka.
Does Rhododendron arboreum have any special cultural meaning?
It is highly valued as Nepal’s national flower and is also an emblem in parts of India and Sri Lanka, representing local pride and identity.
Good reading and sources
- Encyclopaedia BritannicaArticle
- IUCN Red List of Threatened SpeciesIUCN Red List, Article
- Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
- Where it has been recordedGBIF, Plant database
- Sightings and photos by naturalistsiNaturalist, Plant database
- Rhododendron arboreum on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Rhododendron arboreum", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.
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