I lost a tomato plant recently. First, the bottom leaves had some interveinal chlorosis, consistent with nutrient deficiency. Then, the whole plant became lighter green, blossoms started to drop, and formed tomatoes died.
Thinking it might be a case of calcium deficiency (though really hoping it wasn't a wilt), I tried some lime. Didn't work.
I pulled out the plant two days ago. Interestingly, it has almost no stem left just above the soil. That's covered in the EBs, so I didn't see that. I cut the plant off at the break; I didn't notice any rot above that point, or anything inside the stem to indicate a problem. I then stuck it in a glass of water, where it still sits today.
I haven't a clue as to what caused it. In all my years of gardening in the past, I had remarkably few problems and learned almost nothing, lol. Here in the city, I've found I've had to learn much more.
Above I said "interestingly' because it's the second time that happened to me this season. The first time was about a month ago. I had a hanging upside down thingee that I decided to use for the heck of it (really because I wanted one more tomato plant and had no place else to put it). It was looking a bit wilty, so I looked at it and low and behold, the stem we almost completely severed. I looked at the holder and decided it was the fault of the foam holding it in place. It was sooooo firm and we'd had all those storms and wind, I figured it was worn down from the sawing action.
I took it and place it in water. It rooted. After two weeks I placed it in soil with my Swiss chard (temporary housing). Yesterday, I replanted it in the hanging thingee. I cut out a space in the foam for the stem so it's not rubbing. The plant rebounded beautifully.
I'm not as hopeful that my second plant will do that. It seemed to have suffered much longer and was showing more signs of problems. It really is likely that it was more than a simple wearing of the stem....there is nothing there to cause a wearing of the stem! Sure, it definitely moved around a lot in those storms, but the other stems did, also, and they're fine. But, maybe I'll have a miracle with both of them.