Flowers falling off pepper plants

[Primrose]

I've noticed in the past week that although they are vastly differing heights, all the flowers on my pepper plants in my mini greenhouse have disappoiningly dropped off without forming a pepper. It has been well ventilated with the flap open on all but the chilliest days and I don't recall suffering this problem in previous years. Any suggestions as to what could have caused this?

[Marken]

Perhaps the flowers have not been pollinated. I tend to shake the plants gently to shed the pollen and help pollination. I've kept chilli peppers on a window this year and they are setting fruit like mad without any ventilation to allow insects in to pollinate.
I would have thought that cold wouldnt be a problem after the hot spell we all enjoyed?

[Compo]

Yes this is the tip I have been advised with similar plants in seasons gone by.....shake em gently

CoMpo

[Marken]

Are your plants well watered? If they are too dry they can abort flowers. It may be worth checking moisture levels below the surface of the soil as sometimes watering doesn't penetrate deep enough to the plant roots.