I am growing tomatoes. There is rot on the bottom of the ripening ones. Why is this happening?

I started growing tomatoes for the first time this year. I have both plum and big boy tomatoes. The plums are ripening, but I notice that there is a hole (like it is rotted out) on the bottom of the ripening plum tomatoes. What can I do to prevent this from happening to all my other tomatoes?

I am growing tomatoes. There is rot on the bottom of the ripening ones. Why is this happening?
My problem was that we had too much rain, I googled my problem and found out there are several things that will cause this. Not enough calcium is one, it suggested crumbling up egg shells and placing in the dirt, I did this and between the rain letting up and the shells, they quit rotting, not sure which helped. Be sure and cut off all the yellow leaves that are on the plant too...they suck up good nutrients that the tomatoes need. Also, pick them before they are totally red.
Reply:Sounds like it could be blossom-end rot. Here's a link with pictures and control procedures:



http://vegetablemdonline.ppath.cornell.e...
Reply:This is called black bottom rot, and it is tough to stop. It is more common in container or patio tomatoes. It is due mostly to irregular watering. You can also try to feed the plants a fertilizer/food that contains potash, and regular watering. Good luck.

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