Pacific rhododendron
Rhododendron macrophyllum D.Don ex G.Don
- light
- Part–shade
- water
- Little
- tall
- 8.0 m
- wide
- 4.5 m
Ericaceae
Also called California rhododendron, California Rose-bay, Coast Rhododendron
Formerly Azalea macrophylla, Hymenanthes californica, Hymenanthes macrophylla, Rhododendron californicum, and 1 more
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
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
- Shrub or treeKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- W. Canada to CaliforniaKew's checklist, not yet checked
- Light
- Part shade to shade (under 6 h)Read from KPU Plant Database, one source
- Height
- 7.0 m to 9.0 mRead from KPU Plant Database and Wikipedia, checked by a majority of its sourcesBacked by both sources. Sources differ: KPU Plant Database 7–10 m; Wikipedia 2–9 m
- Spread
- 4.0 m to 5.0 mRead from KPU Plant Database, one source
- Water
- Little: takes droughtRead from KPU Plant Database, one source
- Flowers
- PinkRead from KPU Plant Database and Wikipedia, checked by a majority of its sourcesBacked by both sources. Sources differ: KPU Plant Database pink, white; Wikipedia pink
- Coldest it survives
- -23.3 °C (USDA zone 6a)Read from KPU Plant Database, one source
Not known yet: heat, hottest it survives.
In other languages (11)
- Czech
- pěnišník velkolistý
- Estonian
- suurelehine rodo, suurelehine rododendron
- Chinese (China)
- 海岸杜鹃
- Chinese
- 海濱杜鵑
- Russian
- Рододендрон крупнолистный
- Spanish
- Rosa de bahía de California
- Swedish
- västamerikansk rododendron
- Polish
- różanecznik wielkolistny
- Slovak
- rododendron veľkolistý
- French
- Rhododendron à grandes feuilles
- Lithuanian
- Didžiažiedis rododendras
Where this comes from
- iNaturalist, read 2026-10-26, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-25, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- KPU Plant Database, read 2026-10-25, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY-SA 3.0
- iNaturalist, read 2026-10-26, CC BY-SA
- iNaturalist, read 2026-10-26, CC BY
- iNaturalist, read 2026-10-26, CC BY
- 3D model: Rhododendron macrophyllum (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.