"Penny Morgan" wrote in message .com...
They have blossom end rot caused by a calcium deficiency with inconsistent
watering. You can still eat the ones with black ends. Just cut it off and
eat the rest of the tomato. What you're experiencing is very common. If
you start watering the same amount on a consistent schedule, you should see
the problem go away. Try adding some calcium to the soil with lime or
crushed egg shells mixed with water. The lime may take awhile to act.
There are also calcium products that you can buy in Home Depot or a good
garden center that may act faster. I always give my plants a boost with
fish emulsion when they are suffering. It always seems to perk them up.

Even the best gardeners get blossom end rot when conditions are just right.
It's nice that the problem is an easy one to solve and not something that is
incurable.

Also, certain types of tomatoes are more susceptible than others -
that's one of the reasons I don't bother growing Roma's any more.

Happy gardening.

Mike