brainstorming
Active Member
I probably would have left those leaves on, they weren't dead yet. But it appears to me like heat stress. What's your temperature above the plants? This can also be exacerbated with very low humidity.
Check out: http://www.icmag.com/ic/showthread.php?t=11688
Heat has been between 75 and 82 F and Humidity around 30 to 50% depending on when I watered them... would that do it?