Im growing various types of greens and lettuces and they all get this disease from seedling to harvest to some extent, more prevalent in red leaves. It has been very hot lately dont know if that would have anything to do with it
Whats wrong with my lettuce??
My first thought was flea-beetles, but don't know for certain.
Did you ever consider thrips for the lettuce damage?
Just posted a new thread with more photos I am still struggling with identifying this problem. My water ph is around 8, I am going to get an RODI filter to lower this and prevent nutrient lockout but this seems to be a disease I canít pinpoint looking at photos