What causes tomato plants to die from the bottom until it reaches the top of the plant?

This is the second year that when I planted tomatoes that the entire plant has died. It starts from the bottom, all the leaves and stem start to die. It looks like they are dring out but I give plenty of water. Then it works it way to the top of the plant and them it is completely dead.

What causes tomato plants to die from the bottom until it reaches the top of the plant?
too hot of roots


soppy always wet soil





soupy pot situation cooked roots as with a black pot rather than a clay pot...


too hot for it where it was?
Reply:check the stem for worms also pull the plant out to see if something ate the root system. let me know whatyou see and where you live statewise.
Reply:sounds like blight , did you plant your tomats in the same spot as last year crop rotation will help with this to stop your new from getting infected from last years plants that sound like they were infected , you need to move them arround your gagden every year to stop reinfecting your plants
Reply:Could be cut worms or to much acid in the soil. Always cut away the sucker limbs that are on it. They don't produce tomatoes. That's the new one that grow between the leaf and the stalk.
Reply:bugs!!! debug the dirt next year,