Adromischus marianae is a perennial succulent and slow-growing subshrub, up to 6 inches (15 cm) tall. It is a very variable species with usually thin and short branches and forms a small cluster of rough, warty and nearly spherical leaves resembling dried raisins, quite variable in color but usually green or red-brown or purplish, up to 1.5 inches (4 cm) long. Flowers are green with a pinkish nuance, up to 0.5 inch (1.2 cm) long
Many species are easy to grow in any free-draining gritty compost. Their compact habit allows a collection to be maintained in a small space and they grow well on any sunny window ledge or the top shelf of the greenhouse. Water mostly in spring/autumn and let them dry out between waterings. Adromischus tolerate cool, frost-free conditions during the winter if kept dry. It is as well to keep water off the foliage during the winter. Mealy bugs and vine weevils can be discouraged with a systemic insecticide. Frost hardy to 19 °F (-7 °C).