Miracle grow covers a multitude of soil deficiencies. I'm not too proud to give those plants a dose of the green stuff when warranted. The bottom line is, anything that you grow in your own yard, using your own soil, water and sunshine, has got to be better than anything that you drive to the store and purchase with your hard earned money. You can also give your tomatoes each a tablespoon of epsom salts as a foliar feed, or sprinkled at the base of the plants and watered in. You won't believe how fast they green up for you.
Took your advice and added Epsom salts. Also have a bucket of weeds started brewing, I hid it behind the composter so DH doesn't think I've gone completely off the deep end. I figure I'm doing pretty well having two tubs on the counter labeled 'chickens' and 'compost'.