Epithelantha micromeris, ping-pong ball cactus is a miniature globose cactus, erect, unbranched or in small clumps, not deep-seated in substrate, appearing ashy grey and relatively rough in general aspect.
lthough regarded as a choice and difficult plant, in cultivation it is relatively easy. It needs a particularly well-draining soil mix (rot prone). Water sparingly. Frost Tolerance: Depending on the variety, will handle -12° C (Temperature Zone: USDA 8-11) Sun Exposure: Light shade to full sun