If you love vygies and waterwise gardening, Delosperma is one of those genera that quickly becomes addictive. These are mostly low, mat-forming succulents in the Aizoaceae, famous for their shimmering “ice” cells on the leaves and stems that catch the light like tiny crystals – a clever way of reflecting harsh African sun while storing precious moisture.

The genus is centred in southern Africa, with the bulk of species in South Africa and Lesotho, but stretching north into eastern Africa as far as Ethiopia and even into the Arabian Peninsula. Many are local endemics tied to specific rock types or mountain systems – from arid Karoo flats and grassland dolerite outcrops to subalpine Drakensberg cliffs. Seed capsules are typically hygrochastic: they open when wet, using little “valves” and wings to present or flick out the seed in rain – exactly the kind of detail that makes them fascinating subjects for a seed-focused collector.

In the garden, Delosperma species are valued for their carpets of daisy-like flowers in intense shades of magenta, pink, purple, yellow and orange, often over a very long season. Given full sun and sharply drained, sandy or gravelly soils, many species are remarkably drought tolerant and need little more than occasional watering once established. They are ideal for rockeries, retaining walls, containers, green roofs and banks where a tough, colourful, pollinator-friendly groundcover is needed.

For a succulent enthusiast in South Africa, Delosperma offers a huge palette of local biodiversity – from tiny, niche endemics to showy garden workhorses – all fitting neatly into the broader push toward waterwise, climate-resilient gardening.

Delosperma caespitosum (Delosperma caespitosum var. roseum) – Tuft Sheepfig

A true cushion vygie, Delosperma caespitosum is endemic to South Africa, occurring from KwaZulu-Natal into the Eastern Cape and up into the Lesotho mountains. It forms dense, low mats of succulent leaves that hug the ground, an alpine-style Delosperma that naturally clings to rocky slopes and cool, open grassland outcrops. In late spring and summer the plants explode into a mass of purple, daisy-like flowers that quite literally smother the foliage.

In cultivation this is a fantastic choice for rock gardens, alpine troughs and retaining walls, especially in cooler or higher-lying parts of South Africa where winter frost is a reality. The neat cushions stay attractive year-round, with the foliage sometimes flushing red in cold weather, adding extra winter interest. The glowing purple flowers bring instant “wow factor” to sunny gravel beds and pair beautifully with hardy grasses and other mesembs.

For South African buyers looking for a truly waterwise, cold-tolerant succulent, D. caespitosum ticks all the boxes. It handles summer storms, winter frost and poor, stony soils with ease, provided drainage is excellent. From seed it is easy and rewarding: fine seed germinates best on the surface of a sandy, well-drained mix in bright, cool light. Once pricked out and established, these little cushions will grace your rockery for many years with minimal fuss.