A woody climber, shrub or small tree from southern African forests, grown mainly as a curiosity or in botanical collections. Its key feature is a poisonous sap containing cardiac glycosides.
Family
Apocynaceae (Dogbane family)
Grows as
Tree, Shrub, Climber
Light
Part shade, Bright indirect
Water
Water when the top layer of soil is dry, reducing in cooler months.
Soil
Free-draining, fertile mix with added organic matter.
Temperature
18–30 °C; protect below 10 °C.
How easy
Moderate
Safety
Toxic: All parts contain cardiac glycosides (strophanthin) and are poisonous if ingested; sap can irritate skin and eyes.
Native range
E. Zimbabwe to Eastern Cape
Climate
subtropical
About
Strophanthus speciosus, commonly known as the forest poison rope, is a tree, shrub or woody climber which is native to southern Africa.
Where it grows
Strophanthus speciosus is native to Zimbabwe, South Africa and Eswatini. It occurs in forests and their margins from 300–1,400 metres (1,000–5,000 ft) altitude.
Uses
Local medicinal uses of S. speciosus include snakebite treatment. The plant has also been used as arrow poison. As with other species of Strophanthus it contains the cardiac glycoside strophanthin - plants of allied genera contain similar compounds.
Text excerpted from the Wikipedia article Strophanthus speciosus 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.