Boron Deficiency in Tomatoes I don't know if anyone had this
problem with their tomatoes. I noticed suddenly one year that my
tomoates had become tough and had yellow/whitish streaks in the
flesh. The flavor also suffered as well. Finally after three years
I found an article that is is a boron deficiency. Just an FYI Here
is an excellent website with photos and descriptions of tomato
mineral deficiencies AND how to solve them.
http://www.hbci.com/~wenonah/min-def/tomatoes.htm