Sedum forsterianum is a glabrous perennial succulent herb. It forms a low mound with blue-green leaves aggregated into a tight, cone-like, terminal rosette and persistent brown, shrunken, dead leaves towards the base.
Sedum forsterianum usually grows in rather mesic habitats, on cliffs, rocky outcrops, screes and sand, generally on poor soils, both in dry open places and in wet woodlands; also naturalised in churchyards, and on walls, hedgebanks, waste ground and railway land. The erect flowering stem about 20 cm long sustains a terminal corymb with 3-7 branches which is characteristically drooping in bud. The flowers are bright yellow, starry and appear in summer. It can he confused with Sedum rupestre but less robust, with stems erect in bud. Invasive in Australia, Ireland, Norway, and Falkland Islands.