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Rhododendron cinnabarinum

Rhododendron cinnabarinum
Photo: Daderot, CC0

Rhododendron cinnabarinum is a straggling evergreen shrub from the Himalaya and southwest China, grown for its cinnabar-red to yellow bell flowers. Key to success is cool, humus-rich, acidic soil with good drainage and some shade from hot sun.

Family
Ericaceae (Heather family)
Grows as
Shrub
Light
Part shade
Water
Keep soil evenly moist and never waterlogged; use rainwater or soft water where possible.
Soil
Acidic, humus-rich, well-drained ericaceous mix.
Temperature
10–20 °C; hardy to about -15 °C, protect from hot dry spells above 25 °C.
How easy
Moderate
Safety
Toxic: All parts contain grayanotoxins, which can cause nausea, vomiting, low blood pressure and heart rhythm problems if eaten, including honey made from its nectar.. Toxic to cats and dogs (ASPCA).
Native range
C. & E. Himalaya to S. Tibet
Climate
temperate

About

Rhododendron cinnabarinum (朱砂杜鹃) is a rhododendron species native to eastern Nepal, Bhutan, Sikkim, southeastern Tibet, and southwest China, where it grows at altitudes of 1,900–4,000 m (6,200–13,100 ft). It is a straggling evergreen

shrub that grows to 1–3 m (3.3–9.8 ft) in height, with leathery leaves that are broadly elliptic, oblong-elliptic to oblong-lanceolate or ovate, 3–6 by 1.5–2.5 cm in size. The flowers are yellow to cinnabar red, sometimes ranging to plum colors.

Other Rhododendron plants

Rhododendron aberconwayi · Sagan Dalya · Rhododendron adenogynum · Rhododendron adenosum · Rhododendron aganniphum · Cascade azalea · Rhododendron albrechtii · Rhododendron album · Rhododendron alutaceum · Rhododendron annae · Rhododendron anthopogon · Rhododendron araiophyllum

Text excerpted from the Wikipedia article Rhododendron cinnabarinum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

Pet safety from the ASPCA toxic and non-toxic plant lists.

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