Credit: David Foley
Aloiampelos striatula
Background and story
The Hardy Aloe (Aloe striatula, now correctly Aloiampelos striatula) is a robust, branching succulent native to the mountain regions of South Africa, particularly the Karoo and adjacent highlands.
It was introduced to Ireland and Britain in the 19th century, becoming notable as one of the very few aloes capable of surviving outdoors.
Unlike typical rosette-forming aloes, it develops into a woody, shrubby plant up to around 2 metres tall, with narrow, recurved leaves arranged along upright stems marked by distinctive longitudinal stripes, reflected in the name striatula meaning “little stripes”.
In summer, it produces tall spikes of yellow to orange tubular flowers, which add a strong vertical accent to its architectural form.
Did you know?
The species name striatula means “little stripes”, referring to the distinct longitudinal striping on the stems and leaf sheaths, one of its most recognisable features.
Hardiness and conservation
The recorded RHS hardiness rating is H3, which means this plant is generally hardy in coastal and relatively mild districts, especially where drainage and shelter are good. The recorded USDA/PFAF hardiness value is 9-12, which is useful as a broad winter-temperature guide, but it should not be read as a direct substitute for the RHS rating. Local hardiness always depends on local shelter, drainage, winter wet, salt-laden wind and the plant’s age and establishment.
The IUCN Red List status recorded here is Not Assessed (NA).
CITES data is also recorded for this plant: Appendix II. Appendix II means international trade is regulated so that trade does not damage wild populations.
Additional notes for Ireland and Britain
In Ireland and Britain, Aloe striatula is one of the most reliable outdoor succulents, especially in coastal and mild regions, where it can be grown year-round in the ground. It prefers full sun and sharply drained soil, making it particularly well suited to gravel gardens, dry banks, and sheltered walls. It typically grows to 1–2 metres, forming a bushy, branching structure that may even lean or scramble through surrounding planting. While it may suffer some leaf damage in colder winters, it often regenerates strongly from the base, and can be easily propagated from cuttings, adding to its practical appeal.
From a conservation and hardiness perspective, Aloe striatula is not considered threatened, with a stable presence in its native range and widespread cultivation. In terms of hardiness, it is exceptionally robust for an aloe, tolerating moderate frost (typically around −5°C, and sometimes lower in well-drained conditions) and even occasional snow. The RHS classifies it as hardy in mild regions (H3), confirming its ability to grow outdoors across much of Ireland and Britain, particularly where drainage is excellent. Its main vulnerabilities are poor drainage and prolonged winter wet, rather than cold alone. In an Irish context, it stands out as one of the most dependable and versatile “exotic” plants available.
Notable features
- It isn’t really an aloe anymore. Modern DNA research showed it belongs to a group of “scrambling aloes”, now placed in the genus Aloiampelos, separate from true Aloe.
- It is one of the hardiest succulent-type plants known. Unlike most aloes, it naturally grows in high-altitude South African mountains and can tolerate frost and even light snow, making it suitable for Irish and UK gardens (RHS H3).
- It can regrow after severe cold damage. Established plants can die back to the base in harsh winters and reshoot from underground stems, behaving more like a herbaceous perennial than a typical succulent.
- It forms spreading, shrub-like colonies rather than rosettes. Instead of a single rosette like many succulents, it develops branched, woody stems and can form dense clumps several metres across, giving it an almost shrub-like character.
Earlscliffe notes
Aloe striatula is the hardiest and most floriferous of a large number of Aloe species tested at Earlcliffe. It has never shown any sign of weather damage since planted in 1969, has survived -7.5°C and flowers regularly. A. striatula is much hardier than A.vera but appears to have many of the same medicinal qualities. It is one of the easiest of plants to propagate here as branches stuck in the open ground root readily at any time of the year.