Always worth persevering! i have only grown them once, and I just let them do their own thing. i understand that pollination can sometimes be a problem, but if they have set, that shouldn't be a problem. i found that they just run riot in my greenhouse and I didn't select fruit to continue with and cut off all the others, which is the correct thing to do, but I can't bear it! Am growing them again this year, but am trying an outdoor variety (still in greenhose at the moment). Will grow a couple inside just to test them out, but will be limiting fruit set. The ones i grew before were absolutely fantastically gorgeous! can't express how much nicer they are than shop bought!