Q.I Have Some New Split-rocks To Plant Indoors. I Know This Is Their Dormant Season. Water Lightly After Planting Or Not?
I’ve just lost several split rocks b/c of incorrect FB advice (every 2 weeks). Glad to find your site! I don’t think these need much watering. . .

Certified GKH Gardening Expert
The best practice is to let the plants tell you when to water. They will start to shrivel when they need it. The time between waterings will depend on the environment, so waiting for some shrivel will cut out all doubt.
Here is an article that will help you to care for the plant:
https://www.gardeningknowhow.com/ornamental/cacti-succulents/lithop/growing-living-stone-plants.htm