Until Rachio makes a schedule type for new seed/sod, here are two work arounds.
The simplest way might be to create 4 separate schedules, each with a different start time. The start times could be 4:30 am, 8:30 am, 12:30 pm and 4:30 pm.
Here’s another way, which requires only one schedule, but is a little more complex to setup. You would need to adjust the times to fit your needs: