I think it's the soil I put in the buckets. Miracle Grow and Top Soil mixture...with a little bit of seed soil to give it some air.
My tomatoes are dying off too. Every third or fourth stem is turning yellow and when I touch it it falls off. And also on my super 100's they have the every few stems thing as well as the leaves on the ends of some of them are turning brown and crispy.
I just don't know what to do.
I have a class at 8...didn't realize it was so late...catch you guys later!