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 invalidum

Despite its unfortunate name, Delosperma invalidum is a robust, low-growing succulent native to South Africa’s drier, rocky regions. It forms small mats or clumps of cylindrical, fleshy leaves adapted to heat, wind and long dry periods. The plant’s tough constitution makes it an excellent candidate for xeriscaping and naturalistic Karoo-style plantings.

During the warm months, D. invalidum displays its daisy-like flowers, each with fine, numerous petals arranged around a prominent central disc. The colours tend to fall within soft pink and magenta shades, adding gentle pops of brightness to otherwise arid spots. Its flowering response is strongest after rain or deep watering, reflecting its ecological rhythm in the veld.

For South African gardeners this is a dependable species for extreme conditions. It tolerates heat, drought, poor soils and high sun exposure with ease. From seed, simply sow on the surface of a lean, sandy mix and maintain light moisture until germination. With so little maintenance required, D. invalidum is a perfect “plant-and-forget” species for sunny banks, rockeries and gravel beds.