We live in a place with limited water, so I have always underwatered the lawn. I was hoping for a poor man’s trasnpiration equation, but I just decided to do X if it was 70 that day and 1.5x if it was 90 (or something like that, I can’t remember) and scale it in between. I also have hours of daylight (sunup to sundown) so I reduce it for that. Then I subtract the inches rained and I hve a rough estimate of the inches per minute in each zone.
I have no idea if that works better or not. The grass isn’t talking and it is the familiar green to brown color.
This is what the log (slack) looks like (but I can’t have them on in the winter, so I just unplug the relay board):
We need 0.25 in water today.
Normally, it would be: 0.50 in.
We've adjusted for sunlight (-17.7%)
We've adjusted for heat (-29.3%)
Compiled from these weather records:
2021-01-23 0.03in 51.94F 0d ago
2021-01-22 0.00in 48.15F 1d ago
2021-01-21 0.01in 48.30F 2d ago
Received this message from hwio:
Program with 0.25 inches for a total cycle time: 42.41 minutes
We have 275 weather reports and 94 water reports in the history