[mom-from-missouri]

Does anyone grow tomatoes from seed that can help me out? I've done it for 20+ years with no problems. But, the last 5 years or so, my tomato plants get about 3 inches tall, then fall over-the stems break and they are dead. They are also very spindly looking. I don't know what I am doing wrong, as I am doing it the way I have always done it....Any ideas?? I usually start them inside the first part of march, and its about that time. I am not sure if I want to attempt it again, or just buy them at 6 inches from the hardware store...