Pepper Plants

Hi, I have 4 plants growing on the window sill looking lovely. All 4 plants at sometime have produced blue and white or pink/red & white flowers, but no peppers.
Do you know when the peppers will arrive. Fingers crossed.
have'nt got a greenhouse, so kept them on the widow sill, which has the sun on them for most of the day.

Thanks

Brushing really helps.  When I have negleted to brush an indoor glower that one just drops off.