Need more information. What does the foliage look like? I'm guessing you have some sort of blight. Do a google search for tomato diseases, and you'll probably find a pic to match what you're seeing in your garden. Are they getting enough water?Does any one know why tomatoes seem to do great...get a couple tomatoes and then just wilt away? So frustrating but it happens a lot! Do I need to fertilize more?
These impatiens reseed and come back year after year on their own. An awesome nursery here grows these gorgeous ferns that we get each spring. I pretty much just fertilize and water and stay out of the way. I have drip irrigation so even that is just the turn of a knob.