When you prepare whole grain jars, it´s good to shake them after the pressure cooking while they are still hot to redistribute the wetter and drier kernels.
After the inoculation:
First time you shake the jars immediately after the inoculation.
The second shake should occur once the colonization is visible at around 5-10% of the jar surface.
A third shake can be made after the mycelium is visible at around 50% of the jar surface.
More shaking doesn´t always mean faster colonization, so don´t overdo it.