Schedules - Gardens and Grass

I read that it is recommended to create a separate schedule for zones that are garden areas than full grass, can this create a situation where 2 zones are running at the same time or are all schedules sharing information to stagger run start/stop activity.

As long as it’s all on one controller it will not overlap zones. It knows even if it has multiple schedules, and it will figure it all out on it’s own.