In article , David W.E.
Roberts writes
Ah..oooops!
I thought (especially after seeing them in the supermarket) that green
peppers were basically unripe red/yellow/orange peppers.

However, just been and checked the label (bought from garden centre).

Sweet pepper bell boy.
Suitable for patio planters.
Can be eaten green or red.

Assuming the label is correct the peppers should turn red.
So I guess the original question stands.

Certainly all of the green peppers I've bought and have left around for
a week or so have started to go red. So I'd always assumed the same as
you (and am not particularly inclined to change my assumption)

--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm