If you have just purchased lithops plants and about to repot them, begin by removing your lithops from their containers. Remove as much of the soil as possible by very gently massaging the soil away from the roots. Also, do your best not to damage any of the delicate roots. When you are done removing as much of the soil as you can, plant your lithops in something other than soil. This is the first tip for keeping your lithops alive and healthy.
Use Prumice for growing Lithops
Plant your lithops plants in 100% pumice. Pumice, not cactus soil or sand or perlite or any other soil mix. Pumice closely resembles the rocks that lithops grow in in their natural setting. The pumice will help greatly to prevent over-watering and also displays the lithops in a really pleasing way. The idea to plant in pumice is from someone who has had success with these tricky little plants. Remove as much of the soil as possible and add pumice.
Lithops need natural growing environment
Tip number 2 for growing your healthy lithops, is to make sure that lithops plants are able to be healthy and happy. We have to give them an environment that closely resembles their natural growing environment.
The first part of that is light. Lithops plants need to have 4 to 5 hours of direct sunlight per day. They also need morning sunlight, not hot afternoon sunlight. Lithops plants can be sunburned when they have had several overcast days, followed by a bright sun shining day. Therefore, the best setting for lithops plants is probably going to be in an east-facing window. Alternatively, if you have a southern facing window where the plants can be sheltered in afternoon. Use curtains or set them in a place that the Sun will not be shining directly on them anytime after lunch.
When to water Lithops
The last tip for keeping healthy lithops plants is also about giving them an environment similar to their natural setting. To be specific : lack of water. If your lithops plant is open across the middle, it should be taking all of its water from the old lobes that are still attached to the plant. This means that we should not be giving it any water during this time. The plant can last for months and that is okay. Plant lovers feel wrong to not give their plants any water for months at a time. However, we must imitate the same watering cycle that these plants are accustomed to and thrive in in their natural setting. A quick way to remember when to water your lithops plants, think of it like this. If your lithops is smiling, it is happy and you should leave it alone. When it has a straight face, it is time to water it again only if the medium is dry. In Summer, lithops needs little to no water.
One of the things about lithopsplants is they are self-sufficient. Everything about this plant, allows it to thrive through drought and intense sunlight and its ability to disguise itself so cleverly from animals that would have eaten it for its water content. Lithops plants are amazing!
Lithops are non-toxic
One last important thing about lithops is that they are non-toxic so if you have a dog or a cat friend living in your house or even young children in your home, they are perfectly safe if they come in contact with this plant.