So I guess I was wrong about backing off the water to 10gals every three days.
I suppose 20 gals every three days isn't to much water, I'll stick with that number for now.
Its always so tricky trying to figure out how to water this time of year when everything get so hot and dry.
Cranking it! Looks spectacular! Is that one plant a purple variety?
You should try and find ETO data being generated locally so you can index your irrigation against water quantities. As they get bigger, they need more water. It goes up exponentially... Keeping digging those test holes!
Try one plant with more water and watch to see any difference....