"Ed" wrote
My tomatoes are coming on fine.. Except that the base/bottom of them are
black.

What kind of infestation is that? What has caused it?

Agree with everyone else, and as they say, inconsistent water supply is said
to be the cause however a few of our first ones out on the allotment are
also showing it and that cannot be inconsistent watering.

--
Regards
Bob Hobden
W.of London. UK