Sometimes called split rocks or pebble plants, living stone plants are extremely drought-resistant and are widely popular in low-water gardens in desert regions. Lithops are fascinating little succulents. The living stone plant is very sensitive to the seasons of the year but can live for decades. Lithops have no true stem and much of the plant is beneath the soil surface. All that’s visible above the ground’s surface is usually a pair of fleshy, succulent leaves that look like stones, with a crevice between them. These leaves have window-like cells on the leaf surfaces. These transparent areas are filled with calcium oxalate, which creates a reflective facet that increases light penetration. They can be grown both indoors and outdoors, but outdoor growers should be careful that they don’t get too much water. They thrive in desert condition with infrequent moisture and intense sunlight. Therefore, mimicking Lithops growing condition is important to keep them healthy. Light and Water Indoors you can keep them anywhere from direct sunlight to partial shade. Be very careful, when growing living stones, not to overwater. These little succulents do not need to be watered in their dormant season, which is autumn to spring. During spring to summer, the trick is to water only when the soil is thoroughly dry (test by inserting a wooden skewer into the soil, and check if it's moist when removed). When you do, drench it and allow it to dry completely before watering again. If you feel like you need to water a little bit due to any signs of shrinkage in the leaves, its best to do a little at a time and in the mornings so it can evaporate if its overwatered.