I own a house with a well. I have 12 zones with ~48 heads as my well can't handle much. For the time being, I've used the 4 unused zones and inserted them as a gap.
Commercial timers have 'delay' between each zone to allow well to 'recharge'. I have a Rainbird ESP timer that was installed by the irrigation guys and I had a delay.
With feature set offered today, I can see two types of features
- Add "Delay between zones" (in minutes) to the setting page. Between each zones, a delay will be inserted
- This UI will include two fields. 'run time' and 'delay time'. The logic would be that when a cumulative set of zone reaches 'run time', it will wait 'delay time' before the next zone runs. In the future the trigger value ('run time') could be replaced by gallons, etc.