Portulacaria afra aka Elephant Bush

Elephant bush tolerates light frost once mature, surviving brief dips down to around -1°C (30°F), and mature plants in its native South Africa can survive winter frosts by producing dense protective growth. For reliable outdoor growth it is best suited to USDA hardiness zones 9–11; in colder climates it should be grown in containers and brought indoors or given frost protection over winter.

Several cultivated varieties of Portulacaria afra are grown, including 'Limpopo', 'Prostrata' (a low, ground-covering form), 'Aurea' (golden-leaved), 'Foliis Variegatus', and 'Medio-picta' (variegated forms). Compact forms are also popular for bonsai, while prostrate cultivars are used as ground cover.

Outdoors, elephant bush grows best in full sun to semi-shade in well-drained sandy or loam soil, and is hardy in USDA zones 9–11. It is drought-tolerant and fire-resistant once established, tolerating both dry conditions and regularly watered beds, which makes it a popular choice for hedges, screens, and xeriscaping in warm climates. It is not native outside of southern and eastern Africa — in California, for example, it is only sparsely documented as a cultivated or naturalized plant.

Portulacaria afra propagates very easily from stem cuttings, which root readily in ordinary potting media or in river sand kept in shade, typically striking root within four to six weeks; cuttings can even be pushed directly into the ground.

Portulacaria afra is generally described as a hardy, fast-growing plant, so unusually slow growth is more likely to point to a care issue — insufficient light, overwatering, or cold stress — than to be typical for the species.

Portulacaria afra's small star-shaped pink flowers are insect-pollinated and provide abundant nectar for insects and birds. In the wild, elephants also browse the plant from the top down, which allows it to spread and regenerate vegetatively.

The leaves of Portulacaria afra are edible and have a pleasantly sour, tart flavor; they are traditionally eaten raw or added to mixed salads and soups in southern Africa, and were historically used to quench thirst and treat dehydration. Useful Tropical Plants rates its edibility 2 out of 5, and no hazards are reported from consuming the leaves.

In traditional southern African medicine, the leaves of Portulacaria afra have been used to treat sore throats, skin ailments, sunburn, and insect stings, and are applied as a mild antiseptic for skin conditions.

Beyond ornamental use as a houseplant, hedge, screen, or bonsai subject, Portulacaria afra is valued ecologically as a soil binder that helps prevent erosion, as wildlife habitat and browse (notably for elephants and, during drought, cattle and goats), and as an unusually effective carbon sink — its ability to use both C3 and CAM photosynthesis lets it sequester significant CO₂ (up to roughly 15.4 tons per hectare annually), a property put to use in large-scale spekboomveld restoration projects in South Africa.