I am growing bell peppers for the first time, from seed recovered from
ones bought in our local supermarket. The plants are in gro-bags, on
benches in the greenhouse, four to a bag. They are about 2ft high, and
I have pinched out the tops as they are now almost touching the glass
roof. The greenhouse is well ventilated during the day, and never
fully closed up even at night.

The plants are not shaded and get watered daily, sometimes twice a day
in this recent hot spell, and fed with Tomorite tomato feed once a
week at the recommended strength. I have no problem with amount of
flower or with fruit setting (I go round every couple of days with a
soft paint brush), and there are plenty of fruits swelling on each
bush. But once they get to the size of small satsuma oranges, many of
them develop dark, brownish, sunken lesions that spread through the
fruit.

What's causing the problem, and how do I prevent it?


--
Chris

E-mail: christopher[dot]hogg[at]virgin[dot]net