Very likely calcium deficiency.
I've seen it regularly among container grown veggies. Add some cal-mag to your feeding and I'll bet it improves, or stops worsening.
I love tomatoes... and having a home for them year-round is an added bonus of growing the Shrek indoors!

Oh and I WANT PICS!! Especially when they bear fruit.

What are you using for a pollenator? Do you have bugs, or are you going to do it manually?
stinkyattic Reviewed by stinkyattic on . TOMATOS i know this might not be the place to put but was wandering,i have some 3 plants doing fine under tl5/ho/54/865halide 4 bulbs and also just ferted for first time and bottom leaves look dark green with lite green spoches on leaves is it a sing of to much water or ferts?any help really tomatoes this time better boys and one big boy Rating: 5