In 1986 I set up a shade house that would start 72,000 cuttings at one time. I used solenoid valves and two separate timers. The ten minute timer was set to spray a 5 second mist every ten minutes. In front of that, I put a water heater timer that would turn the 10 minute timer off during the night. If you are able to insert that into your system, you could take care of that. Tom
