Maybe. The chemistry needs to be right. It's best if you can check the
specific gravity, the PH, and the acidity before you pitch the yeast.
In a good year, vinifera (European) grapes will be spot-on. Other grape
varieties or other than ideal conditions will require the addition of
sugar or acid to the must.

Compo wrote:
> If I make wine with grapes rather than fruit or veg do I need to add
> anything other than yeast, please?
>
> --
> Cheers,
> Compo