Besides diseasesbeing the cause, tomatoes can sometimes turn red without
ripeness when the fruit is on a blighted plant, in the presence of gases (like
the hothouse tomatoes in supermarkets) or in the case of excessive heat.

Are the tomatoes smaller than you'd expect for mature fruit? Do they taste
unripe?
Perfectly ripe Romas can sometimes have a lot of green in the central vein of
the fruit, too.
-=epm=-

In matters of truth and justice,
there is no difference between large and small problems,
for issues concerning the treatment of people are all the same.
- Albert Einstein