Any help with this tomato issue? I've been fighting it for the last couple months and keep losing, originally thought it was a nitrogen deficiency, yellowing and dying of the old growth, I used a typical 20-20-20 fertilizer on it every two weeks. The problems have not gone away and have worsened. I think I've identified the problem but I'm using this old site as reference.
http://vegetablemdonline.ppath.cornell.edu/DiagnosticKeys/TomKey.html Anyone here have any ideas on what's causing it?