All the grapes can be harvested from the Landgraab cellar and from the unmarked tomb in the woods near the river.
The Special merchant sells the Uncommon and Rare grapes. You'll need visa level 3 for some of them.
It isn't likely that you'll get all six grapes on your first trip to France but it is possible. The easiest way to do it would be getting Pangu's Axe from China before your first trip to France, so that you can explore the tomb in the woods. It's under some boulders and you'll need the axe to get in. There isn't any adventure for that tomb so you can do it whenever you want.
Comments
The Special merchant sells the Uncommon and Rare grapes. You'll need visa level 3 for some of them.
It isn't likely that you'll get all six grapes on your first trip to France but it is possible. The easiest way to do it would be getting Pangu's Axe from China before your first trip to France, so that you can explore the tomb in the woods. It's under some boulders and you'll need the axe to get in. There isn't any adventure for that tomb so you can do it whenever you want.