Why won't my tomatoes grow?!

My mom was in town a few weeks ago and she planted me the prettiest garden for my back porch/patio. I've got a cute little herb garden with chives, parsley, hot peppers (although my husband hasn't been brave enough to try one yet), and basil, a tomato plant, a pepper plant, two containers impatiens, and a bucket of lantanas. My lantanas are growing like crazy which is great since they attract butterflies and those are my favorite. And my herbs are also overflowing and we've been using them to make homemade pizzas, on potatos, and other dishes. But my tomatos and peppers are suffering big time! I water them everyday and they are in plenty of sun. I can't say that it's been too hot just yet - probably 80's and nice for most of the time, although we did have some storms. It just looks like the poor thing is suffering.

I did some research online about how to grow your own tomato plants - and it suggested a larger container for the tomatos so they could really root into the soil as well as plenty of fertilizer. I did fertilize them when I first got them, but I'm thinking about picking up some different plant food to help it out a litte. Any other suggestions?! I really don't want them to die. I definitely do not have a green thumb!