was it on a grafted rootstock? it may be that you pruned out the black variety and now you have the rootstock variety.

No not on a grafted rootstock. We're a bit baffled really. Thanks for your thoughts anyway.

Hi Sorry this is not an answer but the same has happened to mine htis year last year they were green this year they are black, I thought I had lost my marbles lol! so glad this has happened to someone else

Maybe you have to wait a bit longer for them to go black Peemick. Our Pinot Noire was green until about a few days ago. In response to more sunshine they have gone over to colour change very fast. As far as I understand it all black grapes start out green. The weather has been very mixed in different places. We had a drought+heatwave, others have had grey skies,coolness and rain. Pinot Noire may be turning black now but will not be sweet until October, the starlings always know that!

Thanks for all your responses and good to know I'm not the only one! Will wait a bit longer & see if they change colour as we've got plenty of sunshine this week. Cheers!

Like your answer but any idea why mine have gone from Green to Red? thanks

I posted a picture of my Pinot noire grapes changing colour from green to black Peemick.

Thanks for the picture. I think I might remove some of my leaves as you have done to help with the ripening process.

I have no idea Freddie12 why yours have gone the opposite way to mine...have they ripened more this year or something like that?