Over-watering is one of the biggest mistakes a Lithops plant gardener can make. However, if you make this mistake, it will be somewhat easy to recognize. When you over-water a Lithops plant, the leaves will begin to turn yellow. They will also take on a soft texture compared to their normal firmness. In extreme cases, an overwatered Lithops plant will develop rot and eventually die. That is why it is so important to make sure you don’t give too much water to your Lithops plant.