How to Grow Living Stones
Plants Growing living stones in pots is preferred for most but the hottest zones. Lithops need a cactus mix or potting soil with some sand incorporated. The potting media needs to dry before you add moisture and you must place the pot in as bright an area as possible.
Place the plant in a southern facing window for optimum light entry. Propagation is through division or seed, although seed grown plants take many months to establish and years before they resemble the parent plant. You can find both seeds and starts on the Internet or at succulent nurseries. Adult plants are common at even big box nurseries.
Lithops care is easy as long as you remember what type of climate the plant originates from and mimic those growing conditions. 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 fall to spring.
If you wish to encourage flowering, add a diluted cactus fertilizer in spring when you commence watering again. Lithops plants do not have many pest problems, but they may get scale, moisture gnats and several fungal diseases. Watch for signs of discoloration and evaluate your plant often for immediate treatment.