Tip for tomato lovers: you MUST grow ‘Sungold Select’ tomatoes from Baker Creek Seeds...these are awesome; I could eat them like blueberries. ...and my wife? She likes them so much she said she would defend them with firearms. They are HERS, and woe be to them that would try to sneak a couple behind her back...I believe that includes me. (gulp!)
I found this great site that has pictures of tomatoes suffering from the stress of a lack of one nutrient.
I added a high N fertilizer today, with a bit of P and K.
http://4e.plantphys.net/article.php?ch=3&id=289