“Split Rock” tends to need a bit less water than other succulents. It’s best to use the “soak and dry” method, and allow the soil to dry out completely between waterings. Water sparingly during the winter. Over-watering can cause your “Split Rock” to burst or rot.
Regarding this, is a split rock succulent rare?
The Split Rock Succulent, or Pleiospilos nelii, is an uncommon species of succulent native to South Africa. It grows naturally in semi-arid areas above an elevation of about 2850 feet.