Hello Gardeners,

I know this is likely an oft-posted subject, but, as a very novice gardening couple who started their very own city garden, we need your seasoned advice!

We have two large planters on the roof that are growing Better Boy and Cherry tomatoes, confederate jasmine, and some pepper varieties. Everything seemed to be going great until this past week. In one of the planters, the cherry tomato leaves are turning yellow and brown. I've tried diagnosing the problem myself, but, the results have been inconclusive. These plants have been getting big and are just now showing fruit. The other planter's tomatoes (Better Boy) still looks very healthy.

I've posted 3 pictures here: http://www.flickr.com/photos/53033950@N00/

New leaves have started growing and appear healthy. This is affecting the older leaves on the plant. My only thought is that we have a drainage problem - we used excess coconut liner pieces in lieu of stone at the bottom of this box. What should I do? Should I remove and discard the plants and soil and start over or is there a way to fix this? Have my plants caught blight? Is this wilt?

Thanks again,

Eric and Christina