Why has my grape vine only had a few bunches this year? It is quite old and I did cut it back last year.?

dont know exactly how old it is because we only moved into house where it is last year

Why has my grape vine only had a few bunches this year? It is quite old and I did cut it back last year.?
Age can certainly be a factor with Grape production. Grapevines tend to bear the most fruit between years 5 and 15. And proper pruning is also essential to Grape production. Always remember that new vines do not make fruit. And two year old vines, and older, do not make fruit. Only one year old vines make any Grapes. And even those must be pruned in such a way as to preserve the buds that will make the next season's Grapes. Weather will also be a huge factor that can vary from year to year. See the site below for more information.
Reply:Which country do you live in? UK? Rain! No sun!
Reply:For the same reason my tomatoes are still flowers, they had a lousy start in June/July.