you should fill out the plant troubleshoot form so it gives us a littlre more background information to answer your question.


From my experience it looks like a calcium-magnesium defiency or your ph is off. you could have a cal-mag defiency strictly because your ph is off.


The rust brown spots on your leaves have me leaning toward cal-mag . If you overfertalized you would see some tip burn, which does not look like your problem.