Thanks. I have an electronic pH meter and I seem to be in the normal range. I did add a 0-1-2 “bloom booster” phosphate amendment about a week ago, but in almost trace amount and this doesn’t look like nute burn.
You may be right about under watering though. It kind of looks like leaf burn. I water every night, but temps have been 100+F for over a month straight now, so maybe it’s still not enough water.