When you plant a succulent for several years, it is normal to lose some leaves. Did you find this article helpful? It is crucial to wait for soil to dry before you water again. It is important to water Ariocarpus only once it has dried completely. Ariocarpus need to be grown in the soil only specified for cacti. These succulents require lots of sunlight. They do not require water. In such cases, a shade cloth would be of benefit or even moving the plants from the sun in the hottest hours during the day. You can stop growth by rubbing the spines and leaves thoroughly with a damp towel.