Heartsy,

Here's a few ideas off the cuff. If you planted the fall tomatoes in the same soil as the summer plants, it is possible that maybe your soil is depleted of nutrients. Miracle Grow is a quick fix but it's always a good idea to amend soil between plantings. Also, I mix in a slow-release fertilizer when I plant. And mulching is never a bad idea either.

If you think your soil is OK, then maybe you've just had too much rain. So maybe your soil is saturated with water because it can't drain. Are other plants in your yard suffering too?

Other possibilities are low overnight temperatures and less sunlight. I have no idea what your night time lows in your area have been lately, but cold nights can shut down many varieties. Purplish leaves can mean that the plant is not taking in phosphorus and this can be due to the cold and not the lack of nutrients in the soil. As for the shorter days, there's not much to do about that except make sure your plants are in the sunniest spot you have.

Now, I don't know if the next bit of info applies to tomatoes but here goes. Pale green foilage can mean a lack of iron. There are several iron supplements available at garden stores to remedy this problem.

And one last thing, there is a thread in the forum that lists several websites for diagnosing tomato problems. Just scroll down a bit and find it (I think it's titled Tomato Problem Solver 2 and it was started by Earl). Personally, I like the Texas A&M Tomato Problem Solver.

Good Luck,

Chris

Here is a link that might be useful: Texas A&M Tomato Problem Solver