Indian azalea
Rhododendron simsii Planch.
- light
- Part sun
- water
- Medium
- tall
- 2.0 m
- wide
- 2.0 m
Ericaceae
Also called Red Azalea
Formerly Azalea breynii, Azalea simsii, Azalea vittata, Azalea vittata-punctata, and 7 more
When it flowers
Flowers August to September and November to April in the tropics.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- ShrubKew's checklist, not yet checked
- Climate
- SubtropicalKew's checklist, not yet checked
- Wild in
- S. China to Indo-China, Nansei-shotō to TaiwanKew's checklist, not yet checked
- Light
- Part shade (3 to 6 h)Read from RHS, one source
- Height
- 1.5 m to 2.5 mRead from RHS, one source
- Spread
- 1.5 m to 2.5 mRead from RHS, one source
- Water
- Average: moist, well drainedRead from RHS, one source
- Flowers
- RedRead from RHS, one source
- Coldest it survives
- -10 °C (USDA zone 8a)Read from RHS, one source
Not known yet: heat, hottest it survives.
Grow it with
Suggested by a rule, not by a gardener: same climate (kew), flowering when this plant does not (inaturalist), and a different shape.
African irisFlowers May to July and October, when this does not
Bird of paradiseFlowers May to July and October, when this does not
Cotton RosemallowFlowers May to July and October, when this does not
Creeping WoodsorrelFlowers May to July and October, when this does not
Crimson bottlebrushFlowers May to July and October, when this does not
Heart-leaf ice plantFlowers May to July and October, when this does not
In other languages (11)
- Chinese
- 映山紅 , 紅杜鵑, 唐杜鵑, 唐杜鵑, 杜鹃花
- Japanese
- タイワンヤマツツジ, シナヤマツツジ, トウサツキ
- Chinese (China)
- 映山红, 唐杜鹃, 杜鹃花
- Korean
- 대만철쭉
- Thai
- กุหลาบแดง
- Russian
- Рододендрон Симса
- Swedish
- fönsterazalea
- Slovak
- rododendron Simsov
- Turkish
- Hint Açelyası
- Lithuanian
- Simso rododendras
- Simplified Chinese
- 山石榴, 唐杜鹃, 山踯躅
Where this comes from
- iNaturalist, read 2026-10-24, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-24, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- RHS, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-24, Public domain
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Rhododendron simsii (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.