Why are the bottoms of the tomatoes on my plant turning brown?

Question

Why are the bottoms of the tomatoes on my plant turning brown?

Answer 1

Not enough water,too much fertilizer got onto bottom leaves,watering wrong time of day,Too much water on leaves,tomato wilt the list is endless,you will just have to judge if these things could be the problem.It is a little different growing season this year,seems normal but not quite.Sorry I could not be of more help.

Answer 2

This could be a fungus.  or a parasite worm.

get rid of the plants the best way you can and wash and sterilize your tools your garden gloves - everything - before you use them again.